642092135 has 8 divisors (see below), whose sum is σ = 770680896. Its totient is φ = 513560160.

The previous prime is 642092131. The next prime is 642092183. The reversal of 642092135 is 531290246.

It is a happy number.

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

It is not a de Polignac number, because 642092135 - 2² = 642092131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642092131) 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, 16865 + ... + 39605.

It is an arithmetic number, because the mean of its divisors is an integer number (96335112).

Almost surely, 2^642092135 is an apocalyptic number.

642092135 is a deficient number, since it is larger than the sum of its proper divisors (128588761).

642092135 is a wasteful number, since it uses less digits than its factorization.

642092135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28393.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 642092135 is about 25339.5369926129. The cubic root of 642092135 is about 862.7118896899.

The spelling of 642092135 in words is "six hundred forty-two million, ninety-two thousand, one hundred thirty-five".