742990457 has 18 divisors (see below), whose sum is σ = 866156382. Its totient is φ = 634656000.

The previous prime is 742990433. The next prime is 742990471. The reversal of 742990457 is 754099247.

It can be written as a sum of positive squares in 3 ways, for example, as 466732816 + 276257641 = 21604^2 + 16621^2 .

It is not a de Polignac number, because 742990457 - 2⁶ = 742990393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742990427) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 1235957 + ... + 1236557.

It is an arithmetic number, because the mean of its divisors is an integer number (48119799).

Almost surely, 2^742990457 is an apocalyptic number.

It is an amenable number.

742990457 is a deficient number, since it is larger than the sum of its proper divisors (123165925).

742990457 is an equidigital number, since it uses as much as digits as its factorization.

742990457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 47.

The square root of 742990457 is about 27257.8512909584. The cubic root of 742990457 is about 905.7209468433.

It can be divided in two parts, 742 and 990457, that added together give a palindrome (991199).

The spelling of 742990457 in words is "seven hundred forty-two million, nine hundred ninety thousand, four hundred fifty-seven".