21419025 has 24 divisors (see below), whose sum is σ = 35575104. Its totient is φ = 11371200.

The previous prime is 21419011. The next prime is 21419059. The reversal of 21419025 is 52091412.

It is not a de Polignac number, because 21419025 - 2⁴ = 21419009 is a prime.

It is a super-3 number, since 3×21419025³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21418986 and 21419004.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20260 + ... + 21290.

It is an arithmetic number, because the mean of its divisors is an integer number (1482296).

Almost surely, 2^21419025 is an apocalyptic number.

21419025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21419025 is a deficient number, since it is larger than the sum of its proper divisors (14156079).

21419025 is a wasteful number, since it uses less digits than its factorization.

21419025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321 (or 1316 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 21419025 is about 4628.0692518587. The cubic root of 21419025 is about 277.7153591603.

The spelling of 21419025 in words is "twenty-one million, four hundred nineteen thousand, twenty-five".