1453040521 has 4 divisors (see below), whose sum is σ = 1453122052. Its totient is φ = 1452958992.

The previous prime is 1453040513. The next prime is 1453040543. The reversal of 1453040521 is 1250403541.

It is a happy 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 2 ways, for example, as 915728121 + 537312400 = 30261^2 + 23180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1453040521 - 2³ = 1453040513 is a prime.

It is a super-2 number, since 2×1453040521² = 4222653511335902882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1453041521) 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, 1290 + ... + 53923.

It is an arithmetic number, because the mean of its divisors is an integer number (363280513).

Almost surely, 2^1453040521 is an apocalyptic number.

It is an amenable number.

1453040521 is a deficient number, since it is larger than the sum of its proper divisors (81531).

1453040521 is an equidigital number, since it uses as much as digits as its factorization.

1453040521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81530.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1453040521 is about 38118.7686186215. The cubic root of 1453040521 is about 1132.6417740503.

The spelling of 1453040521 in words is "one billion, four hundred fifty-three million, forty thousand, five hundred twenty-one".