164135025 has 48 divisors (see below), whose sum is σ = 305744320. Its totient is φ = 86313600.

The previous prime is 164135021. The next prime is 164135047. The reversal of 164135025 is 520531461.

It is not a de Polignac number, because 164135025 - 2² = 164135021 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 164135025.

It is not an unprimeable number, because it can be changed into a prime (164135021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47610 + ... + 50940.

Almost surely, 2^164135025 is an apocalyptic number.

164135025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164135025 is a deficient number, since it is larger than the sum of its proper divisors (141609295).

164135025 is a wasteful number, since it uses less digits than its factorization.

164135025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3423 (or 3412 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 164135025 is about 12811.5192307548. The cubic root of 164135025 is about 547.5205471741.

Adding to 164135025 its reverse (520531461), we get a palindrome (684666486).

The spelling of 164135025 in words is "one hundred sixty-four million, one hundred thirty-five thousand, twenty-five".