1401027156 has 36 divisors (see below), whose sum is σ = 3576558804. Its totient is φ = 462384000.

The previous prime is 1401027139. The next prime is 1401027181. The reversal of 1401027156 is 6517201041.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 850655556 + 550371600 = 29166^2 + 23460^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189025 + ... + 196296.

Almost surely, 2^1401027156 is an apocalyptic number.

It is an amenable number.

1401027156 is an abundant number, since it is smaller than the sum of its proper divisors (2175531648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1401027156 is a wasteful number, since it uses less digits than its factorization.

1401027156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385432 (or 385427 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 1401027156 is about 37430.2973004490. The cubic root of 1401027156 is about 1118.9624628329.

Adding to 1401027156 its reverse (6517201041), we get a palindrome (7918228197).

The spelling of 1401027156 in words is "one billion, four hundred one million, twenty-seven thousand, one hundred fifty-six".