1413031021 has 4 divisors (see below), whose sum is σ = 1413742012. Its totient is φ = 1412320032.

The previous prime is 1413031019. The next prime is 1413031031. The reversal of 1413031021 is 1201303141.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 441462121 + 971568900 = 21011^2 + 31170^2 .

It is a cyclic number.

It is not a de Polignac number, because 1413031021 - 2¹ = 1413031019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1413030986 and 1413031004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1413031001) 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, 352506 + ... + 356491.

It is an arithmetic number, because the mean of its divisors is an integer number (353435503).

Almost surely, 2^1413031021 is an apocalyptic number.

It is an amenable number.

1413031021 is a deficient number, since it is larger than the sum of its proper divisors (710991).

1413031021 is an equidigital number, since it uses as much as digits as its factorization.

1413031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710990.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1413031021 is about 37590.3048803811. The cubic root of 1413031021 is about 1122.1490998291.

Adding to 1413031021 its reverse (1201303141), we get a palindrome (2614334162).

The spelling of 1413031021 in words is "one billion, four hundred thirteen million, thirty-one thousand, twenty-one".