25411681 has 5 divisors (see below), whose sum is σ = 25774705. Its totient is φ = 25053770.

The previous prime is 25411643. The next prime is 25411697. The reversal of 25411681 is 18611452.

The square root of 25411681 is 5041.

It is a perfect power (a square, a biquadrate), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-25411681 is a prime.

It is a super-2 number, since 2×25411681² = 1291507062491522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25411601) by changing a digit.

It is a polite number, since it can be written in 4 ways as a sum of consecutive naturals, for example, 357876 + ... + 357946.

It is an arithmetic number, because the mean of its divisors is an integer number (5154941).

Almost surely, 2^25411681 is an apocalyptic number.

25411681 is the 5041-st square number.

25411681 is the 2521-st centered octagonal number.

It is an amenable number.

25411681 is a deficient number, since it is larger than the sum of its proper divisors (363024).

25411681 is an frugal number, since it uses more digits than its factorization.

25411681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 71 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The cubic root of 25411681 is about 293.9980602090.

It can be divided in two parts, 254 and 11681, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 25411681 in words is "twenty-five million, four hundred eleven thousand, six hundred eighty-one".