1404981 has 6 divisors (see below), whose sum is σ = 2029430. Its totient is φ = 936648.

The previous prime is 1404979. The next prime is 1404989. The reversal of 1404981 is 1894041.

It can be written as a sum of positive squares in only one way, i.e., 1285956 + 119025 = 1134^2 + 345^2 .

It is not a de Polignac number, because 1404981 - 2¹ = 1404979 is a prime.

It is a super-2 number, since 2×1404981² = 3947943220722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1404989) 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, 78046 + ... + 78063.

2^1404981 is an apocalyptic number.

It is an amenable number.

1404981 is a deficient number, since it is larger than the sum of its proper divisors (624449).

1404981 is a wasteful number, since it uses less digits than its factorization.

1404981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156115 (or 156112 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1404981 is about 1185.3189444196. The cubic root of 1404981 is about 112.0014083581.

The spelling of 1404981 in words is "one million, four hundred four thousand, nine hundred eighty-one".