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25742997 = 3274011019
BaseRepresentation
bin110001000110…
…0111010010101
31210102212202100
41202030322111
523042233442
62315432313
7431545320
oct142147225
953385670
1025742997
1113593105
128755699
135444457
1435c17b7
1523d784c
hex188ce95

25742997 has 24 divisors (see below), whose sum is σ = 42644160. Its totient is φ = 14659200.

The previous prime is 25742993. The next prime is 25743007. The reversal of 25742997 is 79924752.

It is not a de Polignac number, because 25742997 - 22 = 25742993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25742993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24754 + ... + 25772.

It is an arithmetic number, because the mean of its divisors is an integer number (1776840).

Almost surely, 225742997 is an apocalyptic number.

It is an amenable number.

25742997 is a deficient number, since it is larger than the sum of its proper divisors (16901163).

25742997 is a wasteful number, since it uses less digits than its factorization.

25742997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433 (or 1430 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 25742997 is about 5073.7557095312. The cubic root of 25742997 is about 295.2702569794.

The spelling of 25742997 in words is "twenty-five million, seven hundred forty-two thousand, nine hundred ninety-seven".

Divisors: 1 3 7 9 21 63 401 1019 1203 2807 3057 3609 7133 8421 9171 21399 25263 64197 408619 1225857 2860333 3677571 8580999 25742997