25166420 has 24 divisors (see below), whose sum is σ = 54555648. Its totient is φ = 9741600.

The previous prime is 25166419. The next prime is 25166423. The reversal of 25166420 is 2466152.

It is a self number, because there is not a number n which added to its sum of digits gives 25166420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25166423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19676 + ... + 20915.

It is an arithmetic number, because the mean of its divisors is an integer number (2273152).

Almost surely, 2^25166420 is an apocalyptic number.

25166420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25166420 is an abundant number, since it is smaller than the sum of its proper divisors (29389228).

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

25166420 is a wasteful number, since it uses less digits than its factorization.

25166420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40631 (or 40629 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 25166420 is about 5016.6143961839. The cubic root of 25166420 is about 293.0491594763.

The spelling of 25166420 in words is "twenty-five million, one hundred sixty-six thousand, four hundred twenty".