64121534 has 8 divisors (see below), whose sum is σ = 96874680. Its totient is φ = 31829976.

The previous prime is 64121531. The next prime is 64121537. The reversal of 64121534 is 43512146.

It is an interprime number because it is at equal distance from previous prime (64121531) and next prime (64121537).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×64121534² = 8223142245026312, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64121531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115049 + ... + 115604.

It is an arithmetic number, because the mean of its divisors is an integer number (12109335).

Almost surely, 2^64121534 is an apocalyptic number.

64121534 is a deficient number, since it is larger than the sum of its proper divisors (32753146).

64121534 is a wasteful number, since it uses less digits than its factorization.

64121534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230794.

The product of its digits is 2880, while the sum is 26.

The square root of 64121534 is about 8007.5922723375. The cubic root of 64121534 is about 400.2530357319.

The spelling of 64121534 in words is "sixty-four million, one hundred twenty-one thousand, five hundred thirty-four".