1401264139 has 8 divisors (see below), whose sum is σ = 1577963520. Its totient is φ = 1232783400.

The previous prime is 1401264131. The next prime is 1401264181. The reversal of 1401264139 is 9314621041.

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 1401264139 - 2³ = 1401264131 is a prime.

It is a super-2 number, since 2×1401264139² = 3927082374494822642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1401264139.

It is not an unprimeable number, because it can be changed into a prime (1401264131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2054299 + ... + 2054980.

It is an arithmetic number, because the mean of its divisors is an integer number (197245440).

Almost surely, 2^1401264139 is an apocalyptic number.

1401264139 is a deficient number, since it is larger than the sum of its proper divisors (176699381).

1401264139 is a wasteful number, since it uses less digits than its factorization.

1401264139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4109321.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1401264139 is about 37433.4628240562. The cubic root of 1401264139 is about 1119.0255499116.

The spelling of 1401264139 in words is "one billion, four hundred one million, two hundred sixty-four thousand, one hundred thirty-nine".