25445642 has 8 divisors (see below), whose sum is σ = 38628576. Its totient is φ = 12569452.

The previous prime is 25445633. The next prime is 25445647. The reversal of 25445642 is 24654452.

25445642 is nontrivially palindromic in base 5.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25445599 and 25445608.

It is not an unprimeable number, because it can be changed into a prime (25445647) 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, 76478 + ... + 76809.

It is an arithmetic number, because the mean of its divisors is an integer number (4828572).

Almost surely, 2^25445642 is an apocalyptic number.

25445642 is a deficient number, since it is larger than the sum of its proper divisors (13182934).

25445642 is a wasteful number, since it uses less digits than its factorization.

25445642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153372.

The product of its digits is 38400, while the sum is 32.

The square root of 25445642 is about 5044.3673537918. The cubic root of 25445642 is about 294.1289714432.

The spelling of 25445642 in words is "twenty-five million, four hundred forty-five thousand, six hundred forty-two".