1404138 has 32 divisors (see below), whose sum is σ = 3009600. Its totient is φ = 435456.

The previous prime is 1404133. The next prime is 1404163. The reversal of 1404138 is 8314041.

It is not an unprimeable number, because it can be changed into a prime (1404131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12370 + ... + 12482.

It is an arithmetic number, because the mean of its divisors is an integer number (94050).

2^1404138 is an apocalyptic number.

1404138 is an abundant number, since it is smaller than the sum of its proper divisors (1605462).

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

1404138 is a wasteful number, since it uses less digits than its factorization.

1404138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1404138 is about 1184.9632905706. The cubic root of 1404138 is about 111.9790032919.

Adding to 1404138 its reverse (8314041), we get a palindrome (9718179).

Subtracting 1404138 from its reverse (8314041), we obtain a triangular number (6909903 = T₃₇₁₇).

It can be divided in two parts, 140 and 4138, that added together give a triangular number (4278 = T₉₂).

The spelling of 1404138 in words is "one million, four hundred four thousand, one hundred thirty-eight".