1451470021 has 4 divisors (see below), whose sum is σ = 1527863200. Its totient is φ = 1375076844.

The previous prime is 1451470019. The next prime is 1451470043. The reversal of 1451470021 is 1200741541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1451470021 - 2¹ = 1451470019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1451470621) 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, 38196561 + ... + 38196598.

It is an arithmetic number, because the mean of its divisors is an integer number (381965800).

Almost surely, 2^1451470021 is an apocalyptic number.

It is an amenable number.

1451470021 is a deficient number, since it is larger than the sum of its proper divisors (76393179).

1451470021 is an equidigital number, since it uses as much as digits as its factorization.

1451470021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76393178.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1451470021 is about 38098.1629609618. The cubic root of 1451470021 is about 1132.2335598872.

The spelling of 1451470021 in words is "one billion, four hundred fifty-one million, four hundred seventy thousand, twenty-one".