25149312 has 128 divisors (see below), whose sum is σ = 78336000. Its totient is φ = 7921152.

The previous prime is 25149283. The next prime is 25149317. The reversal of 25149312 is 21394152.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25149317) 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, 65473 + ... + 65855.

It is an arithmetic number, because the mean of its divisors is an integer number (612000).

Almost surely, 2^25149312 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 25149312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39168000).

25149312 is an abundant number, since it is smaller than the sum of its proper divisors (53186688).

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

25149312 is a wasteful number, since it uses less digits than its factorization.

25149312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 407 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 25149312 is about 5014.9089722546. The cubic root of 25149312 is about 292.9827399975.

The spelling of 25149312 in words is "twenty-five million, one hundred forty-nine thousand, three hundred twelve".