721125107 has 8 divisors (see below), whose sum is σ = 785254800. Its totient is φ = 659613024.

The previous prime is 721125077. The next prime is 721125121. The reversal of 721125107 is 701521127.

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 721125107 - 2¹⁴ = 721108723 is a prime.

It is a super-2 number, since 2×721125107² = 1040042839891522898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (721125127) 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, 653828 + ... + 654929.

It is an arithmetic number, because the mean of its divisors is an integer number (98156850).

Almost surely, 2^721125107 is an apocalyptic number.

721125107 is a deficient number, since it is larger than the sum of its proper divisors (64129693).

721125107 is a wasteful number, since it uses less digits than its factorization.

721125107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308805.

The product of its (nonzero) digits is 980, while the sum is 26.

The square root of 721125107 is about 26853.7726772236. The cubic root of 721125107 is about 896.7475637378.

The spelling of 721125107 in words is "seven hundred twenty-one million, one hundred twenty-five thousand, one hundred seven".