25721252 has 6 divisors (see below), whose sum is σ = 45012198. Its totient is φ = 12860624.

The previous prime is 25721251. The next prime is 25721257. The reversal of 25721252 is 25212752.

It can be written as a sum of positive squares in only one way, i.e., 16516096 + 9205156 = 4064^2 + 3034^2 .

It is not an unprimeable number, because it can be changed into a prime (25721251) by changing a digit.

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, 3215153 + ... + 3215160.

It is an arithmetic number, because the mean of its divisors is an integer number (7502033).

Almost surely, 2^25721252 is an apocalyptic number.

It is an amenable number.

25721252 is a deficient number, since it is larger than the sum of its proper divisors (19290946).

25721252 is a wasteful number, since it uses less digits than its factorization.

25721252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6430317 (or 6430315 counting only the distinct ones).

The product of its digits is 2800, while the sum is 26.

The square root of 25721252 is about 5071.6123668908. The cubic root of 25721252 is about 295.1870957165.

The spelling of 25721252 in words is "twenty-five million, seven hundred twenty-one thousand, two hundred fifty-two".