747121121 has 16 divisors (see below), whose sum is σ = 788755968. Its totient is φ = 706305600.

The previous prime is 747121099. The next prime is 747121127. The reversal of 747121121 is 121121747.

It is a cyclic number.

It is not a de Polignac number, because 747121121 - 2²² = 742926817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (747121127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 819656 + ... + 820566.

It is an arithmetic number, because the mean of its divisors is an integer number (49297248).

Almost surely, 2^747121121 is an apocalyptic number.

It is an amenable number.

747121121 is a deficient number, since it is larger than the sum of its proper divisors (41634847).

747121121 is a wasteful number, since it uses less digits than its factorization.

747121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312.

The product of its digits is 784, while the sum is 26.

The square root of 747121121 is about 27333.5164404436. The cubic root of 747121121 is about 907.3963012949.

Adding to 747121121 its reverse (121121747), we get a palindrome (868242868).

The spelling of 747121121 in words is "seven hundred forty-seven million, one hundred twenty-one thousand, one hundred twenty-one".