25642545 has 16 divisors (see below), whose sum is σ = 43441920. Its totient is φ = 12871424.

The previous prime is 25642541. The next prime is 25642567. The reversal of 25642545 is 54524652.

It is a cyclic number.

It is not a de Polignac number, because 25642545 - 2² = 25642541 is a prime.

It is a super-2 number, since 2×25642545² = 1315080228154050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25642541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50025 + ... + 50534.

It is an arithmetic number, because the mean of its divisors is an integer number (2715120).

Almost surely, 2^25642545 is an apocalyptic number.

It is an amenable number.

25642545 is a deficient number, since it is larger than the sum of its proper divisors (17799375).

25642545 is a wasteful number, since it uses less digits than its factorization.

25642545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100584.

The product of its digits is 48000, while the sum is 33.

The square root of 25642545 is about 5063.8468578740. The cubic root of 25642545 is about 294.8856973624.

The spelling of 25642545 in words is "twenty-five million, six hundred forty-two thousand, five hundred forty-five".