1401391357 has 12 divisors (see below), whose sum is σ = 1500724764. Its totient is φ = 1307746880.

The previous prime is 1401391351. The next prime is 1401391367. The reversal of 1401391357 is 7531931041.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 207965241 + 1193426116 = 14421^2 + 34546^2 .

It is not a de Polignac number, because 1401391357 - 2²³ = 1393002749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401391351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10618 + ... + 53995.

It is an arithmetic number, because the mean of its divisors is an integer number (125060397).

Almost surely, 2^1401391357 is an apocalyptic number.

It is an amenable number.

1401391357 is a deficient number, since it is larger than the sum of its proper divisors (99333407).

1401391357 is an equidigital number, since it uses as much as digits as its factorization.

1401391357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64700 (or 64677 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 1401391357 is about 37435.1620405201. The cubic root of 1401391357 is about 1119.0594135924.

The spelling of 1401391357 in words is "one billion, four hundred one million, three hundred ninety-one thousand, three hundred fifty-seven".