391242534 has 8 divisors (see below), whose sum is σ = 782485080. Its totient is φ = 130414176.

The previous prime is 391242517. The next prime is 391242559. The reversal of 391242534 is 435242193.

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

391242534 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 391242495 and 391242504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32603539 + ... + 32603550.

It is an arithmetic number, because the mean of its divisors is an integer number (97810635).

Almost surely, 2^391242534 is an apocalyptic number.

391242534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

391242534 is a wasteful number, since it uses less digits than its factorization.

391242534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65207094.

The product of its digits is 25920, while the sum is 33.

The square root of 391242534 is about 19779.8517183522. The cubic root of 391242534 is about 731.3894435514.

The spelling of 391242534 in words is "three hundred ninety-one million, two hundred forty-two thousand, five hundred thirty-four".