1301128501 has 4 divisors (see below), whose sum is σ = 1316804832. Its totient is φ = 1285452172.

The previous prime is 1301128489. The next prime is 1301128513. The reversal of 1301128501 is 1058211031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1301128489) and next prime (1301128513).

It is a cyclic number.

It is not a de Polignac number, because 1301128501 - 2¹⁹ = 1300604213 is a prime.

It is a super-2 number, since 2×1301128501² = 3385870752229014002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301128901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7838041 + ... + 7838206.

It is an arithmetic number, because the mean of its divisors is an integer number (329201208).

Almost surely, 2^1301128501 is an apocalyptic number.

It is an amenable number.

1301128501 is a deficient number, since it is larger than the sum of its proper divisors (15676331).

1301128501 is an equidigital number, since it uses as much as digits as its factorization.

1301128501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15676330.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 1301128501 is about 36071.1588530227. The cubic root of 1301128501 is about 1091.7085963293.

Adding to 1301128501 its reverse (1058211031), we get a palindrome (2359339532).

The spelling of 1301128501 in words is "one billion, three hundred one million, one hundred twenty-eight thousand, five hundred one".