164412521 has 16 divisors (see below), whose sum is σ = 207064704. Its totient is φ = 127056384.

The previous prime is 164412463. The next prime is 164412541. The reversal of 164412521 is 125214461.

It is not a de Polignac number, because 164412521 - 2¹⁸ = 164150377 is a prime.

It is a super-3 number, since 3×164412521³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (164412541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17096 + ... + 24921.

It is an arithmetic number, because the mean of its divisors is an integer number (12941544).

Almost surely, 2^164412521 is an apocalyptic number.

It is an amenable number.

164412521 is a deficient number, since it is larger than the sum of its proper divisors (42652183).

164412521 is a wasteful number, since it uses less digits than its factorization.

164412521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42080.

The product of its digits is 1920, while the sum is 26.

The square root of 164412521 is about 12822.3445983954. The cubic root of 164412521 is about 547.8289298992.

Adding to 164412521 its reverse (125214461), we get a palindrome (289626982).

The spelling of 164412521 in words is "one hundred sixty-four million, four hundred twelve thousand, five hundred twenty-one".