164542425 has 24 divisors (see below), whose sum is σ = 272690880. Its totient is φ = 87547200.

The previous prime is 164542421. The next prime is 164542453. The reversal of 164542425 is 524245461.

It is not a de Polignac number, because 164542425 - 2² = 164542421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164542421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32196 + ... + 36954.

It is an arithmetic number, because the mean of its divisors is an integer number (11362120).

Almost surely, 2^164542425 is an apocalyptic number.

164542425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164542425 is a deficient number, since it is larger than the sum of its proper divisors (108148455).

164542425 is a wasteful number, since it uses less digits than its factorization.

164542425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5233 (or 5228 counting only the distinct ones).

The product of its digits is 38400, while the sum is 33.

The square root of 164542425 is about 12827.4091304519. The cubic root of 164542425 is about 547.9731736473.

Adding to 164542425 its reverse (524245461), we get a palindrome (688787886).

The spelling of 164542425 in words is "one hundred sixty-four million, five hundred forty-two thousand, four hundred twenty-five".