25451002 has 4 divisors (see below), whose sum is σ = 38176506. Its totient is φ = 12725500.

The previous prime is 25450993. The next prime is 25451003. The reversal of 25451002 is 20015452.

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., 19105641 + 6345361 = 4371^2 + 2519^2 .

It is not an unprimeable number, because it can be changed into a prime (25451003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6362749 + ... + 6362752.

Almost surely, 2^25451002 is an apocalyptic number.

25451002 is a deficient number, since it is larger than the sum of its proper divisors (12725504).

25451002 is a wasteful number, since it uses less digits than its factorization.

25451002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12725503.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 25451002 is about 5044.8986114688. The cubic root of 25451002 is about 294.1496222695.

Adding to 25451002 its reverse (20015452), we get a palindrome (45466454).

The spelling of 25451002 in words is "twenty-five million, four hundred fifty-one thousand, two".