1401400881 has 6 divisors (see below), whose sum is σ = 2024245730. Its totient is φ = 934267248.

The previous prime is 1401400837. The next prime is 1401400921. The reversal of 1401400881 is 1880041041.

1401400881 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 949625856 + 451775025 = 30816^2 + 21255^2 .

It is not a de Polignac number, because 1401400881 - 2⁶ = 1401400817 is a prime.

It is a super-2 number, since 2×1401400881² = 3927848858535152322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401400681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77855596 + ... + 77855613.

Almost surely, 2^1401400881 is an apocalyptic number.

It is an amenable number.

1401400881 is a deficient number, since it is larger than the sum of its proper divisors (622844849).

1401400881 is a wasteful number, since it uses less digits than its factorization.

1401400881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155711215 (or 155711212 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 1401400881 is about 37435.2892469125. The cubic root of 1401400881 is about 1119.0619486676.

The spelling of 1401400881 in words is "one billion, four hundred one million, four hundred thousand, eight hundred eighty-one".