745021261 has 8 divisors (see below), whose sum is σ = 758219040. Its totient is φ = 731842608.

The previous prime is 745021259. The next prime is 745021273. The reversal of 745021261 is 162120547.

745021261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 745021261 - 2¹ = 745021259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745021241) 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, 90270 + ... + 98176.

It is an arithmetic number, because the mean of its divisors is an integer number (94777380).

Almost surely, 2^745021261 is an apocalyptic number.

It is an amenable number.

745021261 is a deficient number, since it is larger than the sum of its proper divisors (13197779).

745021261 is a wasteful number, since it uses less digits than its factorization.

745021261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9563.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 745021261 is about 27295.0775965191. The cubic root of 745021261 is about 906.5453937031.

The spelling of 745021261 in words is "seven hundred forty-five million, twenty-one thousand, two hundred sixty-one".