1451451021 has 16 divisors (see below), whose sum is σ = 2052004800. Its totient is φ = 910009728.

The previous prime is 1451451013. The next prime is 1451451037. The reversal of 1451451021 is 1201541541.

It is not a de Polignac number, because 1451451021 - 2³ = 1451451013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1451450982 and 1451451000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1451451091) 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, 85126 + ... + 100743.

It is an arithmetic number, because the mean of its divisors is an integer number (128250300).

Almost surely, 2^1451451021 is an apocalyptic number.

It is an amenable number.

1451451021 is a deficient number, since it is larger than the sum of its proper divisors (600553779).

1451451021 is a wasteful number, since it uses less digits than its factorization.

1451451021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186028.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1451451021 is about 38097.9136042907. The cubic root of 1451451021 is about 1132.2286194863.

Adding to 1451451021 its reverse (1201541541), we get a palindrome (2652992562).

The spelling of 1451451021 in words is "one billion, four hundred fifty-one million, four hundred fifty-one thousand, twenty-one".