1331466421 has 4 divisors (see below), whose sum is σ = 1341185292. Its totient is φ = 1321747552.

The previous prime is 1331466403. The next prime is 1331466427. The reversal of 1331466421 is 1246641331.

It is a happy number.

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 458559396 + 872907025 = 21414^2 + 29545^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331466421 - 2⁹ = 1331465909 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 (1331466427) 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, 4859230 + ... + 4859503.

It is an arithmetic number, because the mean of its divisors is an integer number (335296323).

Almost surely, 2^1331466421 is an apocalyptic number.

It is an amenable number.

1331466421 is a deficient number, since it is larger than the sum of its proper divisors (9718871).

1331466421 is an equidigital number, since it uses as much as digits as its factorization.

1331466421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9718870.

The product of its digits is 10368, while the sum is 31.

The square root of 1331466421 is about 36489.2644623045. The cubic root of 1331466421 is about 1100.1284756276.

The spelling of 1331466421 in words is "one billion, three hundred thirty-one million, four hundred sixty-six thousand, four hundred twenty-one".