742376421 has 42 divisors (see below), whose sum is σ = 1139708262. Its totient is φ = 483336720.

The previous prime is 742376377. The next prime is 742376441. The reversal of 742376421 is 124673247.

742376421 is a `hidden beast` number, since 7 + 4 + 2 + 3 + 7 + 642 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 581340321 + 161036100 = 24111^2 + 12690^2 .

It is not a de Polignac number, because 742376421 - 2¹³ = 742368229 is a prime.

It is a super-2 number, since 2×742376421² = 1102245500913538482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742376441) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 1610131 + ... + 1610591.

It is an arithmetic number, because the mean of its divisors is an integer number (27135911).

Almost surely, 2^742376421 is an apocalyptic number.

It is an amenable number.

742376421 is a deficient number, since it is larger than the sum of its proper divisors (397331841).

742376421 is an frugal number, since it uses more digits than its factorization.

742376421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573 (or 511 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 742376421 is about 27246.5854924980. The cubic root of 742376421 is about 905.4713704909.

The spelling of 742376421 in words is "seven hundred forty-two million, three hundred seventy-six thousand, four hundred twenty-one".