130237621 has 8 divisors (see below), whose sum is σ = 132494040. Its totient is φ = 127994112.

The previous prime is 130237619. The next prime is 130237649. The reversal of 130237621 is 126732031.

It can be written as a sum of positive squares in 4 ways, for example, as 36360900 + 93876721 = 6030^2 + 9689^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 130237621 - 2¹ = 130237619 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 (130237021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18345 + ... + 24433.

It is an arithmetic number, because the mean of its divisors is an integer number (16561755).

Almost surely, 2^130237621 is an apocalyptic number.

It is an amenable number.

130237621 is a deficient number, since it is larger than the sum of its proper divisors (2256419).

130237621 is an equidigital number, since it uses as much as digits as its factorization.

130237621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6455.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 130237621 is about 11412.1698637901. The cubic root of 130237621 is about 506.8881652632. Note that the first 3 decimals are identical.

Adding to 130237621 its reverse (126732031), we get a palindrome (256969652).

The spelling of 130237621 in words is "one hundred thirty million, two hundred thirty-seven thousand, six hundred twenty-one".