1401156 has 18 divisors (see below), whose sum is σ = 3541902. Its totient is φ = 467040.

The previous prime is 1401151. The next prime is 1401167. The reversal of 1401156 is 6511041.

It can be written as a sum of positive squares in only one way, i.e., 705600 + 695556 = 840^2 + 834^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1401151) 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, 19425 + ... + 19496.

2^1401156 is an apocalyptic number.

It is an amenable number.

1401156 is an abundant number, since it is smaller than the sum of its proper divisors (2140746).

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

1401156 is a wasteful number, since it uses less digits than its factorization.

1401156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38931 (or 38926 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1401156 is about 1183.7043549806. The cubic root of 1401156 is about 111.8996763186.

Adding to 1401156 its reverse (6511041), we get a palindrome (7912197).

It can be divided in two parts, 140 and 1156, that added together give a 4-th power (1296 = 6⁴).

The spelling of 1401156 in words is "one million, four hundred one thousand, one hundred fifty-six".