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21114025 = 529192
BaseRepresentation
bin101000010001…
…0110010101001
31110201200222221
41100202302221
520401122100
62032314041
7344315632
oct120426251
943650887
1021114025
1110a11309
1270a2921
1344b350a
142b38889
151cc101a
hex1422ca9

21114025 has 9 divisors (see below), whose sum is σ = 26209911. Its totient is φ = 16872840.

The previous prime is 21114019. The next prime is 21114031. The reversal of 21114025 is 52041112.

The square root of 21114025 is 4595.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (21114019) and next prime (21114031).

It can be written as a sum of positive squares in only one way, i.e., 7601049 + 13512976 = 2757^2 + 3676^2 .

It is not a de Polignac number, because 21114025 - 25 = 21113993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22516 + ... + 23434.

Almost surely, 221114025 is an apocalyptic number.

21114025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21114025 is the 4595-th square number.

21114025 is the 2298-th centered octagonal number.

It is an amenable number.

21114025 is a deficient number, since it is larger than the sum of its proper divisors (5095886).

21114025 is an frugal number, since it uses more digits than its factorization.

21114025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848 (or 924 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The cubic root of 21114025 is about 276.3908599624.

Multiplying 21114025 by its sum of digits (16), we get a square (337824400 = 183802).

Adding to 21114025 its reverse (52041112), we get a palindrome (73155137).

The spelling of 21114025 in words is "twenty-one million, one hundred fourteen thousand, twenty-five".