642176427 has 8 divisors (see below), whose sum is σ = 860672464. Its totient is φ = 425899008.

The previous prime is 642176393. The next prime is 642176453. The reversal of 642176427 is 724671246.

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

It is not a de Polignac number, because 642176427 - 2⁶ = 642176363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642176467) 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, 553978 + ... + 555135.

It is an arithmetic number, because the mean of its divisors is an integer number (107584058).

Almost surely, 2^642176427 is an apocalyptic number.

642176427 is a deficient number, since it is larger than the sum of its proper divisors (218496037).

642176427 is a wasteful number, since it uses less digits than its factorization.

642176427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109309.

The product of its digits is 112896, while the sum is 39.

The square root of 642176427 is about 25341.2001886256. The cubic root of 642176427 is about 862.7496394793.

The spelling of 642176427 in words is "six hundred forty-two million, one hundred seventy-six thousand, four hundred twenty-seven".