25429966 has 4 divisors (see below), whose sum is σ = 38144952. Its totient is φ = 12714982.

The previous prime is 25429949. The next prime is 25429967. The reversal of 25429966 is 66992452.

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

It is a super-2 number, since 2×25429966² = 1293366341522312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25429967) 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, 6357490 + ... + 6357493.

It is an arithmetic number, because the mean of its divisors is an integer number (9536238).

Almost surely, 2^25429966 is an apocalyptic number.

25429966 is a deficient number, since it is larger than the sum of its proper divisors (12714986).

25429966 is a wasteful number, since it uses less digits than its factorization.

25429966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12714985.

The product of its digits is 233280, while the sum is 43.

The square root of 25429966 is about 5042.8133021162. The cubic root of 25429966 is about 294.0685588335.

The spelling of 25429966 in words is "twenty-five million, four hundred twenty-nine thousand, nine hundred sixty-six".