726121651 has 8 divisors (see below), whose sum is σ = 766654400. Its totient is φ = 685820520.

The previous prime is 726121637. The next prime is 726121667. The reversal of 726121651 is 156121627.

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 726121651 - 2¹³ = 726113459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726121601) 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, 51441 + ... + 64018.

It is an arithmetic number, because the mean of its divisors is an integer number (95831800).

Almost surely, 2^726121651 is an apocalyptic number.

726121651 is a deficient number, since it is larger than the sum of its proper divisors (40532749).

726121651 is a wasteful number, since it uses less digits than its factorization.

726121651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115809.

The product of its digits is 5040, while the sum is 31.

The square root of 726121651 is about 26946.6445220922. The cubic root of 726121651 is about 898.8139318613.

The spelling of 726121651 in words is "seven hundred twenty-six million, one hundred twenty-one thousand, six hundred fifty-one".