1453478621 has 16 divisors (see below), whose sum is σ = 1707446400. Its totient is φ = 1236705120.

The previous prime is 1453478603. The next prime is 1453478627. The reversal of 1453478621 is 1268743541.

It is not a de Polignac number, because 1453478621 - 2⁶ = 1453478557 is a prime.

It is a super-2 number, since 2×1453478621² = 4225200203408123282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1453478627) 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, 31526 + ... + 62456.

It is an arithmetic number, because the mean of its divisors is an integer number (106715400).

Almost surely, 2^1453478621 is an apocalyptic number.

It is an amenable number.

1453478621 is a deficient number, since it is larger than the sum of its proper divisors (253967779).

1453478621 is an equidigital number, since it uses as much as digits as its factorization.

1453478621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31089 (or 31075 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 1453478621 is about 38124.5146985506. The cubic root of 1453478621 is about 1132.7555952623.

The spelling of 1453478621 in words is "one billion, four hundred fifty-three million, four hundred seventy-eight thousand, six hundred twenty-one".