25309012 has 6 divisors (see below), whose sum is σ = 44290778. Its totient is φ = 12654504.

The previous prime is 25309003. The next prime is 25309043. The reversal of 25309012 is 21090352.

It can be written as a sum of positive squares in only one way, i.e., 19945156 + 5363856 = 4466^2 + 2316^2 .

It is a super-2 number, since 2×25309012² = 1281092176832288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3163623 + ... + 3163630.

Almost surely, 2^25309012 is an apocalyptic number.

It is an amenable number.

25309012 is a deficient number, since it is larger than the sum of its proper divisors (18981766).

25309012 is a wasteful number, since it uses less digits than its factorization.

25309012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6327257 (or 6327255 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 25309012 is about 5030.8062972053. The cubic root of 25309012 is about 293.6015859908.

Adding to 25309012 its reverse (21090352), we get a palindrome (46399364).

The spelling of 25309012 in words is "twenty-five million, three hundred nine thousand, twelve".