25122780 has 36 divisors (see below), whose sum is σ = 76206312. Its totient is φ = 6699360.

The previous prime is 25122767. The next prime is 25122781. The reversal of 25122780 is 8722152.

25122780 is nontrivially palindromic in base 11.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25122781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69606 + ... + 69965.

It is an arithmetic number, because the mean of its divisors is an integer number (2116842).

Almost surely, 2^25122780 is an apocalyptic number.

25122780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25122780 is an abundant number, since it is smaller than the sum of its proper divisors (51083532).

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

25122780 is a wasteful number, since it uses less digits than its factorization.

25122780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139586 (or 139581 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 25122780 is about 5012.2629619764. The cubic root of 25122780 is about 292.8796735166.

The spelling of 25122780 in words is "twenty-five million, one hundred twenty-two thousand, seven hundred eighty".