745654521 has 8 divisors (see below), whose sum is σ = 994359744. Its totient is φ = 497026160.

The previous prime is 745654517. The next prime is 745654523. The reversal of 745654521 is 125456547.

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 745654521 - 2² = 745654517 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 745654521.

It is not an unprimeable number, because it can be changed into a prime (745654523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9595 + ... + 39791.

It is an arithmetic number, because the mean of its divisors is an integer number (124294968).

Almost surely, 2^745654521 is an apocalyptic number.

It is an amenable number.

745654521 is a deficient number, since it is larger than the sum of its proper divisors (248705223).

745654521 is a wasteful number, since it uses less digits than its factorization.

745654521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38431.

The product of its digits is 168000, while the sum is 39.

The square root of 745654521 is about 27306.6753926581. The cubic root of 745654521 is about 906.8021722181.

The spelling of 745654521 in words is "seven hundred forty-five million, six hundred fifty-four thousand, five hundred twenty-one".