742792521 has 8 divisors (see below), whose sum is σ = 1033450560. Its totient is φ = 473664752.

The previous prime is 742792513. The next prime is 742792537. The reversal of 742792521 is 125297247.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 742792521 - 2³ = 742792513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 742792521.

It is not an unprimeable number, because it can be changed into a prime (742792511) 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 7 ways as a sum of consecutive naturals, for example, 5382486 + ... + 5382623.

It is an arithmetic number, because the mean of its divisors is an integer number (129181320).

Almost surely, 2^742792521 is an apocalyptic number.

It is an amenable number.

742792521 is a deficient number, since it is larger than the sum of its proper divisors (290658039).

742792521 is a wasteful number, since it uses less digits than its factorization.

742792521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10765135.

The product of its digits is 70560, while the sum is 39.

The square root of 742792521 is about 27254.2202420102. The cubic root of 742792521 is about 905.6405103218.

The spelling of 742792521 in words is "seven hundred forty-two million, seven hundred ninety-two thousand, five hundred twenty-one".