64142427 has 4 divisors (see below), whose sum is σ = 85523240. Its totient is φ = 42761616.

The previous prime is 64142401. The next prime is 64142443. The reversal of 64142427 is 72424146.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64142427 - 2⁶ = 64142363 is a prime.

It is a super-2 number, since 2×64142427² = 8228501882900658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64142394 and 64142403.

It is not an unprimeable number, because it can be changed into a prime (64142527) 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, 10690402 + ... + 10690407.

It is an arithmetic number, because the mean of its divisors is an integer number (21380810).

Almost surely, 2^64142427 is an apocalyptic number.

64142427 is a deficient number, since it is larger than the sum of its proper divisors (21380813).

64142427 is a wasteful number, since it uses less digits than its factorization.

64142427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21380812.

The product of its digits is 10752, while the sum is 30.

The square root of 64142427 is about 8008.8967405005. The cubic root of 64142427 is about 400.2965030772.

The spelling of 64142427 in words is "sixty-four million, one hundred forty-two thousand, four hundred twenty-seven".