64142409 has 8 divisors (see below), whose sum is σ = 87609312. Its totient is φ = 41718560.

The previous prime is 64142401. The next prime is 64142443. The reversal of 64142409 is 90424146.

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

It is a cyclic number.

It is not a de Polignac number, because 64142409 - 2³ = 64142401 is a prime.

It is a super-2 number, since 2×64142409² = 8228497264646562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64142401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260619 + ... + 260864.

It is an arithmetic number, because the mean of its divisors is an integer number (10951164).

Almost surely, 2^64142409 is an apocalyptic number.

It is an amenable number.

64142409 is a deficient number, since it is larger than the sum of its proper divisors (23466903).

64142409 is a wasteful number, since it uses less digits than its factorization.

64142409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521527.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 64142409 is about 8008.8956167502. The cubic root of 64142409 is about 400.2964656327.

The spelling of 64142409 in words is "sixty-four million, one hundred forty-two thousand, four hundred nine".