1390271291 has 8 divisors (see below), whose sum is σ = 1435551744. Its totient is φ = 1345017960.

The previous prime is 1390271273. The next prime is 1390271299. The reversal of 1390271291 is 1921720931.

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

It is a cyclic number.

It is not a de Polignac number, because 1390271291 - 2¹⁴ = 1390254907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390271299) 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, 176156 + ... + 183878.

It is an arithmetic number, because the mean of its divisors is an integer number (179443968).

Almost surely, 2^1390271291 is an apocalyptic number.

1390271291 is a deficient number, since it is larger than the sum of its proper divisors (45280453).

1390271291 is an equidigital number, since it uses as much as digits as its factorization.

1390271291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13561.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 1390271291 is about 37286.3418827860. The cubic root of 1390271291 is about 1116.0916309337.

The spelling of 1390271291 in words is "one billion, three hundred ninety million, two hundred seventy-one thousand, two hundred ninety-one".