25012620 has 36 divisors (see below), whose sum is σ = 75872160. Its totient is φ = 6669984.

The previous prime is 25012619. The next prime is 25012621. The reversal of 25012620 is 2621052.

It is an interprime number because it is at equal distance from previous prime (25012619) and next prime (25012621).

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

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 25012593 and 25012602.

It is not an unprimeable number, because it can be changed into a prime (25012621) 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, 69300 + ... + 69659.

It is an arithmetic number, because the mean of its divisors is an integer number (2107560).

Almost surely, 2^25012620 is an apocalyptic number.

25012620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25012620 is an abundant number, since it is smaller than the sum of its proper divisors (50859540).

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

25012620 is a wasteful number, since it uses less digits than its factorization.

25012620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138974 (or 138969 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 25012620 is about 5001.2618407758. The cubic root of 25012620 is about 292.4509670164.

Adding to 25012620 its reverse (2621052), we get a palindrome (27633672).

The spelling of 25012620 in words is "twenty-five million, twelve thousand, six hundred twenty".