25721326 has 16 divisors (see below), whose sum is σ = 40930560. Its totient is φ = 12088440.

The previous prime is 25721317. The next prime is 25721329. The reversal of 25721326 is 62312752.

It is a super-2 number, since 2×25721326² = 1323173222396552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25721294 and 25721303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25721329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2395 + ... + 7561.

It is an arithmetic number, because the mean of its divisors is an integer number (2558160).

Almost surely, 2^25721326 is an apocalyptic number.

25721326 is a deficient number, since it is larger than the sum of its proper divisors (15209234).

25721326 is a wasteful number, since it uses less digits than its factorization.

25721326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5319.

The product of its digits is 5040, while the sum is 28.

The square root of 25721326 is about 5071.6196623958. The cubic root of 25721326 is about 295.1873788005.

The spelling of 25721326 in words is "twenty-five million, seven hundred twenty-one thousand, three hundred twenty-six".