25917420 has 48 divisors (see below), whose sum is σ = 72803808. Its totient is φ = 6888960.

The previous prime is 25917383. The next prime is 25917421. The reversal of 25917420 is 2471952.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (25917421) 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, 27192 + ... + 28128.

It is an arithmetic number, because the mean of its divisors is an integer number (1516746).

Almost surely, 2^25917420 is an apocalyptic number.

25917420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25917420 is an abundant number, since it is smaller than the sum of its proper divisors (46886388).

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

25917420 is a wasteful number, since it uses less digits than its factorization.

25917420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410 (or 1408 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 25917420 is about 5090.9154383077. The cubic root of 25917420 is about 295.9356294161.

It can be divided in two parts, 2591 and 7420, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 25917420 in words is "twenty-five million, nine hundred seventeen thousand, four hundred twenty".