130721457 has 8 divisors (see below), whose sum is σ = 174939520. Its totient is φ = 86825520.

The previous prime is 130721453. The next prime is 130721467. The reversal of 130721457 is 754127031.

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

It is not a de Polignac number, because 130721457 - 2² = 130721453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130721453) 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, 79582 + ... + 81207.

It is an arithmetic number, because the mean of its divisors is an integer number (21867440).

Almost surely, 2^130721457 is an apocalyptic number.

It is an amenable number.

130721457 is a deficient number, since it is larger than the sum of its proper divisors (44218063).

130721457 is a wasteful number, since it uses less digits than its factorization.

130721457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161063.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 130721457 is about 11433.3484596596. The cubic root of 130721457 is about 507.5150902677.

Adding to 130721457 its reverse (754127031), we get a palindrome (884848488).

The spelling of 130721457 in words is "one hundred thirty million, seven hundred twenty-one thousand, four hundred fifty-seven".