1351452521 has 4 divisors (see below), whose sum is σ = 1354663044. Its totient is φ = 1348242000.

The previous prime is 1351452467. The next prime is 1351452601. The reversal of 1351452521 is 1252541531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 254849296 + 1096603225 = 15964^2 + 33115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1351452521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1351952521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1604630 + ... + 1605471.

It is an arithmetic number, because the mean of its divisors is an integer number (338665761).

Almost surely, 2^1351452521 is an apocalyptic number.

It is an amenable number.

1351452521 is a deficient number, since it is larger than the sum of its proper divisors (3210523).

1351452521 is an equidigital number, since it uses as much as digits as its factorization.

1351452521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210522.

The product of its digits is 6000, while the sum is 29.

The square root of 1351452521 is about 36762.1071349290. The cubic root of 1351452521 is about 1105.6056877472.

The spelling of 1351452521 in words is "one billion, three hundred fifty-one million, four hundred fifty-two thousand, five hundred twenty-one".