25436642 has 16 divisors (see below), whose sum is σ = 47570112. Its totient is φ = 9910320.

The previous prime is 25436629. The next prime is 25436651. The reversal of 25436642 is 24663452.

It is a junction number, because it is equal to n+sod(n) for n = 25436599 and 25436608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82433 + ... + 82740.

It is an arithmetic number, because the mean of its divisors is an integer number (2973132).

Almost surely, 2^25436642 is an apocalyptic number.

25436642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25436642 is a deficient number, since it is larger than the sum of its proper divisors (22133470).

25436642 is a wasteful number, since it uses less digits than its factorization.

25436642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165193.

The product of its digits is 34560, while the sum is 32.

The square root of 25436642 is about 5043.4751907787. The cubic root of 25436642 is about 294.0942900244.

The spelling of 25436642 in words is "twenty-five million, four hundred thirty-six thousand, six hundred forty-two".