25128734 has 8 divisors (see below), whose sum is σ = 37778400. Its totient is φ = 12535936.

The previous prime is 25128721. The next prime is 25128781. The reversal of 25128734 is 43782152.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25128734.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13094 + ... + 14889.

It is an arithmetic number, because the mean of its divisors is an integer number (4722300).

Almost surely, 2^25128734 is an apocalyptic number.

25128734 is a deficient number, since it is larger than the sum of its proper divisors (12649666).

25128734 is a wasteful number, since it uses less digits than its factorization.

25128734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28434.

The product of its digits is 13440, while the sum is 32.

The square root of 25128734 is about 5012.8568700892. The cubic root of 25128734 is about 292.9028087991.

The spelling of 25128734 in words is "twenty-five million, one hundred twenty-eight thousand, seven hundred thirty-four".