25671972 has 48 divisors (see below), whose sum is σ = 64495872. Its totient is φ = 7918080.

The previous prime is 25671959. The next prime is 25671973. The reversal of 25671972 is 27917652.

It is a self number, because there is not a number n which added to its sum of digits gives 25671972.

It is not an unprimeable number, because it can be changed into a prime (25671973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11413 + ... + 13475.

It is an arithmetic number, because the mean of its divisors is an integer number (1343664).

Almost surely, 2^25671972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25671972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32247936).

25671972 is an abundant number, since it is smaller than the sum of its proper divisors (38823900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25671972 is a wasteful number, since it uses less digits than its factorization.

25671972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148 (or 2146 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 25671972 is about 5066.7516220948. The cubic root of 25671972 is about 294.9984563742.

The spelling of 25671972 in words is "twenty-five million, six hundred seventy-one thousand, nine hundred seventy-two".