25668442 has 4 divisors (see below), whose sum is σ = 38502666. Its totient is φ = 12834220.

The previous prime is 25668427. The next prime is 25668473. The reversal of 25668442 is 24486652.

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

It can be written as a sum of positive squares in only one way, i.e., 17147881 + 8520561 = 4141^2 + 2919^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6417109 + ... + 6417112.

Almost surely, 2^25668442 is an apocalyptic number.

25668442 is a deficient number, since it is larger than the sum of its proper divisors (12834224).

25668442 is a wasteful number, since it uses less digits than its factorization.

25668442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12834223.

The product of its digits is 92160, while the sum is 37.

The square root of 25668442 is about 5066.4032606969. The cubic root of 25668442 is about 294.9849345940.

The spelling of 25668442 in words is "twenty-five million, six hundred sixty-eight thousand, four hundred forty-two".