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2265661 = 2398507
BaseRepresentation
bin1000101001001000111101
311021002220101
420221020331
51040000121
6120321101
725154266
oct10511075
94232811
102265661
111308252
12913191
13614338
1442d96d
152eb491
hex22923d

2265661 has 4 divisors (see below), whose sum is σ = 2364192. Its totient is φ = 2167132.

The previous prime is 2265647. The next prime is 2265671. The reversal of 2265661 is 1665622.

It is the 615-th star number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2265661 - 29 = 2265149 is a prime.

It is a Duffinian number.

2265661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2265611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49231 + ... + 49276.

It is an arithmetic number, because the mean of its divisors is an integer number (591048).

22265661 is an apocalyptic number.

It is an amenable number.

2265661 is a deficient number, since it is larger than the sum of its proper divisors (98531).

2265661 is an equidigital number, since it uses as much as digits as its factorization.

2265661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98530.

The product of its digits is 4320, while the sum is 28.

The square root of 2265661 is about 1505.2112808506. The cubic root of 2265661 is about 131.3403924561.

It can be divided in two parts, 2265 and 661, that added together give a triangular number (2926 = T76).

The spelling of 2265661 in words is "two million, two hundred sixty-five thousand, six hundred sixty-one".

Divisors: 1 23 98507 2265661