742156420 has 24 divisors (see below), whose sum is σ = 1650207384. Its totient is φ = 279399936.

The previous prime is 742156417. The next prime is 742156451. The reversal of 742156420 is 24651247.

It can be written as a sum of positive squares in 4 ways, for example, as 320839744 + 421316676 = 17912^2 + 20526^2 .

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, 1091067 + ... + 1091746.

It is an arithmetic number, because the mean of its divisors is an integer number (68758641).

Almost surely, 2^742156420 is an apocalyptic number.

It is an amenable number.

742156420 is an abundant number, since it is smaller than the sum of its proper divisors (908050964).

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

742156420 is a wasteful number, since it uses less digits than its factorization.

742156420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182839 (or 2182837 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 742156420 is about 27242.5479718766. The cubic root of 742156420 is about 905.3819170895.

The spelling of 742156420 in words is "seven hundred forty-two million, one hundred fifty-six thousand, four hundred twenty".