642949246 has 16 divisors (see below), whose sum is σ = 1017331200. Its totient is φ = 303910488.

The previous prime is 642949193. The next prime is 642949267.

642949246 is nontrivially palindromic in base 10.

It is a super-4 number, since 4×642949246⁴ (a number of 36 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 642949196 and 642949205.

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, 541 + ... + 35863.

It is an arithmetic number, because the mean of its divisors is an integer number (63583200).

Almost surely, 2^642949246 is an apocalyptic number.

642949246 is a deficient number, since it is larger than the sum of its proper divisors (374381954).

642949246 is a wasteful number, since it uses less digits than its factorization.

642949246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35823.

The product of its digits is 746496, while the sum is 46.

The square root of 642949246 is about 25356.4438752756. The cubic root of 642949246 is about 863.0955890765.

The spelling of 642949246 in words is "six hundred forty-two million, nine hundred forty-nine thousand, two hundred forty-six".