634142155 has 8 divisors (see below), whose sum is σ = 763661232. Its totient is φ = 505519968.

The previous prime is 634142137. The next prime is 634142219. The reversal of 634142155 is 551241436.

It is a happy number.

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 634142155 - 2¹⁵ = 634109387 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222664 + ... + 225493.

It is an arithmetic number, because the mean of its divisors is an integer number (95457654).

Almost surely, 2^634142155 is an apocalyptic number.

634142155 is a deficient number, since it is larger than the sum of its proper divisors (129519077).

634142155 is a wasteful number, since it uses less digits than its factorization.

634142155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448445.

The product of its digits is 14400, while the sum is 31.

The square root of 634142155 is about 25182.1793139514. The cubic root of 634142155 is about 859.1365748359.

The spelling of 634142155 in words is "six hundred thirty-four million, one hundred forty-two thousand, one hundred fifty-five".