742705524 has 60 divisors (see below), whose sum is σ = 2118096288. Its totient is φ = 225061200.

The previous prime is 742705507. The next prime is 742705531. The reversal of 742705524 is 425507247.

It is a happy number.

It is a super-2 number, since 2×742705524² = 1103222990760229152, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 19 ways as a sum of consecutive naturals, for example, 100632 + ... + 107759.

Almost surely, 2^742705524 is an apocalyptic number.

It is an amenable number.

742705524 is an abundant number, since it is smaller than the sum of its proper divisors (1375390764).

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

742705524 is a wasteful number, since it uses less digits than its factorization.

742705524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208418 (or 208407 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The square root of 742705524 is about 27252.6241672247. The cubic root of 742705524 is about 905.6051522726.

It can be divided in two parts, 742 and 705524, that added together give a triangular number (706266 = T₁₁₈₈).

The spelling of 742705524 in words is "seven hundred forty-two million, seven hundred five thousand, five hundred twenty-four".