1621252341 has 10 divisors (see below), whose sum is σ = 2421870902. Its totient is φ = 1080834840.

The previous prime is 1621252331. The next prime is 1621252427. The reversal of 1621252341 is 1432521261.

1621252341 is a `hidden beast` number, since 1 + 621 + 2 + 5 + 2 + 34 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1522170225 + 99082116 = 39015^2 + 9954^2 .

It is not a de Polignac number, because 1621252341 - 2⁵ = 1621252309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621252301) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10007650 + ... + 10007811.

Almost surely, 2^1621252341 is an apocalyptic number.

It is an amenable number.

1621252341 is a deficient number, since it is larger than the sum of its proper divisors (800618561).

1621252341 is an equidigital number, since it uses as much as digits as its factorization.

1621252341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20015473 (or 20015464 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1621252341 is about 40264.7779206591. Note that the first 3 decimals coincide. The cubic root of 1621252341 is about 1174.7628532421.

The spelling of 1621252341 in words is "one billion, six hundred twenty-one million, two hundred fifty-two thousand, three hundred forty-one".