164131425 has 18 divisors (see below), whose sum is σ = 293978022. Its totient is φ = 87536640.

The previous prime is 164131423. The next prime is 164131489. The reversal of 164131425 is 524131461.

It is a happy number.

164131425 is a `hidden beast` number, since 1 + 641 + 3 + 14 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 26749584 + 137381841 = 5172^2 + 11721^2 .

It is not a de Polignac number, because 164131425 - 2¹ = 164131423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164131423) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 364512 + ... + 364961.

Almost surely, 2^164131425 is an apocalyptic number.

164131425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164131425 is a deficient number, since it is larger than the sum of its proper divisors (129846597).

164131425 is a wasteful number, since it uses less digits than its factorization.

164131425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729489 (or 729481 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 164131425 is about 12811.3787314247. The cubic root of 164131425 is about 547.5165441926.

Adding to 164131425 its reverse (524131461), we get a palindrome (688262886).

The spelling of 164131425 in words is "one hundred sixty-four million, one hundred thirty-one thousand, four hundred twenty-five".