1391235401 has 8 divisors (see below), whose sum is σ = 1411434024. Its totient is φ = 1371156480.

The previous prime is 1391235397. The next prime is 1391235407. The reversal of 1391235401 is 1045321931.

It can be written as a sum of positive squares in 4 ways, for example, as 16605625 + 1374629776 = 4075^2 + 37076^2 .

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 1391235401 - 2² = 1391235397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1391235407) 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, 6380 + ... + 53133.

It is an arithmetic number, because the mean of its divisors is an integer number (176429253).

Almost surely, 2^1391235401 is an apocalyptic number.

It is an amenable number.

1391235401 is a deficient number, since it is larger than the sum of its proper divisors (20198623).

1391235401 is an equidigital number, since it uses as much as digits as its factorization.

1391235401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59851.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1391235401 is about 37299.2681027390. The cubic root of 1391235401 is about 1116.3495629582.

The spelling of 1391235401 in words is "one billion, three hundred ninety-one million, two hundred thirty-five thousand, four hundred one".