164264421 has 12 divisors (see below), whose sum is σ = 232661792. Its totient is φ = 103067328.

The previous prime is 164264383. The next prime is 164264473. The reversal of 164264421 is 124462461.

It is a happy number.

It is not a de Polignac number, because 164264421 - 2¹⁵ = 164231653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164264021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93865 + ... + 95598.

Almost surely, 2^164264421 is an apocalyptic number.

It is an amenable number.

164264421 is a deficient number, since it is larger than the sum of its proper divisors (68397371).

164264421 is a wasteful number, since it uses less digits than its factorization.

164264421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189500 (or 189483 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 164264421 is about 12816.5682224221. The cubic root of 164264421 is about 547.6643888261.

The spelling of 164264421 in words is "one hundred sixty-four million, two hundred sixty-four thousand, four hundred twenty-one".