71242534 has 16 divisors (see below), whose sum is σ = 117282816. Its totient is φ = 32187400.

The previous prime is 71242519. The next prime is 71242601. The reversal of 71242534 is 43524217.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6022 + ... + 13369.

It is an arithmetic number, because the mean of its divisors is an integer number (7330176).

Almost surely, 2^71242534 is an apocalyptic number.

71242534 is a deficient number, since it is larger than the sum of its proper divisors (46040282).

71242534 is a wasteful number, since it uses less digits than its factorization.

71242534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19571.

The product of its digits is 6720, while the sum is 28.

The square root of 71242534 is about 8440.5292488090. The cubic root of 71242534 is about 414.5527363114.

The spelling of 71242534 in words is "seventy-one million, two hundred forty-two thousand, five hundred thirty-four".