25722406 has 4 divisors (see below), whose sum is σ = 38583612. Its totient is φ = 12861202.

The previous prime is 25722401. The next prime is 25722413. The reversal of 25722406 is 60422752.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25722401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6430600 + ... + 6430603.

It is an arithmetic number, because the mean of its divisors is an integer number (9645903).

Almost surely, 2^25722406 is an apocalyptic number.

25722406 is a deficient number, since it is larger than the sum of its proper divisors (12861206).

25722406 is a wasteful number, since it uses less digits than its factorization.

25722406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12861205.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 25722406 is about 5071.7261361395. The cubic root of 25722406 is about 295.1915102349.

Subtracting from 25722406 its sum of digits (28), we obtain a triangular number (25722378 = T₇₁₇₂).

The spelling of 25722406 in words is "twenty-five million, seven hundred twenty-two thousand, four hundred six".