25722461 has 4 divisors (see below), whose sum is σ = 25855932. Its totient is φ = 25588992.

The previous prime is 25722451. The next prime is 25722469. The reversal of 25722461 is 16422752.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8375236 + 17347225 = 2894^2 + 4165^2 .

It is a cyclic number.

It is not a de Polignac number, because 25722461 - 2¹⁸ = 25460317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25722469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66446 + ... + 66831.

It is an arithmetic number, because the mean of its divisors is an integer number (6463983).

Almost surely, 2^25722461 is an apocalyptic number.

It is an amenable number.

25722461 is a deficient number, since it is larger than the sum of its proper divisors (133471).

25722461 is a wasteful number, since it uses less digits than its factorization.

25722461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133470.

The product of its digits is 6720, while the sum is 29.

The square root of 25722461 is about 5071.7315583536. The cubic root of 25722461 is about 295.1917206289.

The spelling of 25722461 in words is "twenty-five million, seven hundred twenty-two thousand, four hundred sixty-one".