642970342 has 16 divisors (see below), whose sum is σ = 1102959360. Its totient is φ = 275377608.

The previous prime is 642970333. The next prime is 642970351. The reversal of 642970342 is 243079246.

It is an interprime number because it is at equal distance from previous prime (642970333) and next prime (642970351).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8209 + ... + 36787.

It is an arithmetic number, because the mean of its divisors is an integer number (68934960).

Almost surely, 2^642970342 is an apocalyptic number.

642970342 is a deficient number, since it is larger than the sum of its proper divisors (459989018).

642970342 is a wasteful number, since it uses less digits than its factorization.

642970342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30195.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 642970342 is about 25356.8598607951. The cubic root of 642970342 is about 863.1050287358.

The spelling of 642970342 in words is "six hundred forty-two million, nine hundred seventy thousand, three hundred forty-two".