1291501379 has 12 divisors (see below), whose sum is σ = 1505775384. Its totient is φ = 1104483744.

The previous prime is 1291501363. The next prime is 1291501397. The reversal of 1291501379 is 9731051921.

It is not a de Polignac number, because 1291501379 - 2⁴ = 1291501363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1291501319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8042 + ... + 51455.

It is an arithmetic number, because the mean of its divisors is an integer number (125481282).

Almost surely, 2^1291501379 is an apocalyptic number.

1291501379 is a deficient number, since it is larger than the sum of its proper divisors (214274005).

1291501379 is an equidigital number, since it uses as much as digits as its factorization.

1291501379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59954 (or 59947 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 1291501379 is about 35937.4648382437. The cubic root of 1291501379 is about 1089.0093906513.

The spelling of 1291501379 in words is "one billion, two hundred ninety-one million, five hundred one thousand, three hundred seventy-nine".