1453406521 has 16 divisors (see below), whose sum is σ = 1698637824. Its totient is φ = 1217646864.

The previous prime is 1453406503. The next prime is 1453406533. The reversal of 1453406521 is 1256043541.

It is a happy number.

It is not a de Polignac number, because 1453406521 - 2²¹ = 1451309369 is a prime.

It is a super-2 number, since 2×1453406521² = 4224781030570646882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1453406221) 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, 288006 + ... + 293008.

It is an arithmetic number, because the mean of its divisors is an integer number (106164864).

Almost surely, 2^1453406521 is an apocalyptic number.

It is an amenable number.

1453406521 is a deficient number, since it is larger than the sum of its proper divisors (245231303).

1453406521 is an equidigital number, since it uses as much as digits as its factorization.

1453406521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1453406521 is about 38123.5691010168. The cubic root of 1453406521 is about 1132.7368647886.

The spelling of 1453406521 in words is "one billion, four hundred fifty-three million, four hundred six thousand, five hundred twenty-one".