25402742 has 4 divisors (see below), whose sum is σ = 38104116. Its totient is φ = 12701370.

The previous prime is 25402721. The next prime is 25402747. The reversal of 25402742 is 24720452.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×25402742² = 1290598602237128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25402747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6350684 + ... + 6350687.

It is an arithmetic number, because the mean of its divisors is an integer number (9526029).

Almost surely, 2^25402742 is an apocalyptic number.

25402742 is a deficient number, since it is larger than the sum of its proper divisors (12701374).

25402742 is a wasteful number, since it uses less digits than its factorization.

25402742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12701373.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 25402742 is about 5040.1132923775. The cubic root of 25402742 is about 293.9635831920.

The spelling of 25402742 in words is "twenty-five million, four hundred two thousand, seven hundred forty-two".