1351371121 has 3 divisors (see below), whose sum is σ = 1351407883. Its totient is φ = 1351334360.

The previous prime is 1351371113. The next prime is 1351371169. The reversal of 1351371121 is 1211731531.

The square root of 1351371121 is 36761.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 5948721 + 1345422400 = 2439^2 + 36680^2 .

It is not a de Polignac number, because 1351371121 - 2³ = 1351371113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1351371421) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18381 + ... + 55141.

Almost surely, 2^1351371121 is an apocalyptic number.

1351371121 is the 36761-st square number.

1351371121 is the 18381-st centered octagonal number.

It is an amenable number.

1351371121 is a deficient number, since it is larger than the sum of its proper divisors (36762).

1351371121 is an frugal number, since it uses more digits than its factorization.

1351371121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73522 (or 36761 counting only the distinct ones).

The product of its digits is 630, while the sum is 25.

The cubic root of 1351371121 is about 1105.5834898753.

Multiplying 1351371121 by its sum of digits (25), we get a square (33784278025 = 183805²).

The spelling of 1351371121 in words is "one billion, three hundred fifty-one million, three hundred seventy-one thousand, one hundred twenty-one".