1371942621 has 18 divisors (see below), whose sum is σ = 2305237662. Its totient is φ = 783966960.

The previous prime is 1371942613. The next prime is 1371942631. The reversal of 1371942621 is 1262491731.

1371942621 is a `hidden beast` number, since 13 + 7 + 19 + 4 + 2 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1364489721 + 7452900 = 36939^2 + 2730^2 .

It is not a de Polignac number, because 1371942621 - 2³ = 1371942613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371942631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1555050 + ... + 1555931.

It is an arithmetic number, because the mean of its divisors is an integer number (128068759).

Almost surely, 2^1371942621 is an apocalyptic number.

It is an amenable number.

1371942621 is a deficient number, since it is larger than the sum of its proper divisors (933295041).

1371942621 is a wasteful number, since it uses less digits than its factorization.

1371942621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111001 (or 3110991 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1371942621 is about 37039.7438031097. The cubic root of 1371942621 is about 1111.1652457732.

The spelling of 1371942621 in words is "one billion, three hundred seventy-one million, nine hundred forty-two thousand, six hundred twenty-one".