1342431621 has 12 divisors (see below), whose sum is σ = 1942345548. Its totient is φ = 893441664.

The previous prime is 1342431617. The next prime is 1342431637. The reversal of 1342431621 is 1261342431.

It is a happy number.

1342431621 is a `hidden beast` number, since 1 + 3 + 4 + 2 + 4 + 31 + 621 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 615536100 + 726895521 = 24810^2 + 26961^2 .

It is not a de Polignac number, because 1342431621 - 2² = 1342431617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1342431611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120430 + ... + 131103.

It is an arithmetic number, because the mean of its divisors is an integer number (161862129).

Almost surely, 2^1342431621 is an apocalyptic number.

It is an amenable number.

1342431621 is a deficient number, since it is larger than the sum of its proper divisors (599913927).

1342431621 is a wasteful number, since it uses less digits than its factorization.

1342431621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252132 (or 252129 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 1342431621 is about 36639.2087933132. The cubic root of 1342431621 is about 1103.1402337492.

The spelling of 1342431621 in words is "one billion, three hundred forty-two million, four hundred thirty-one thousand, six hundred twenty-one".