747298521 has 8 divisors (see below), whose sum is σ = 1107108960. Its totient is φ = 498198996.

The previous prime is 747298499. The next prime is 747298561. The reversal of 747298521 is 125892747.

It is a happy number.

It is not a de Polignac number, because 747298521 - 2²⁵ = 713744089 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (747298561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13838835 + ... + 13838888.

It is an arithmetic number, because the mean of its divisors is an integer number (138388620).

Almost surely, 2^747298521 is an apocalyptic number.

It is an amenable number.

747298521 is a deficient number, since it is larger than the sum of its proper divisors (359810439).

747298521 is a wasteful number, since it uses less digits than its factorization.

747298521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27677732 (or 27677726 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 747298521 is about 27336.7613480456. The cubic root of 747298521 is about 907.4681144456.

The spelling of 747298521 in words is "seven hundred forty-seven million, two hundred ninety-eight thousand, five hundred twenty-one".