1272404 has 24 divisors (see below), whose sum is σ = 2634240. Its totient is φ = 526176.

The previous prime is 1272379. The next prime is 1272409. The reversal of 1272404 is 4042721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29 + ... + 1595.

It is an arithmetic number, because the mean of its divisors is an integer number (109760).

2^1272404 is an apocalyptic number.

1272404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1317120).

1272404 is an abundant number, since it is smaller than the sum of its proper divisors (1361836).

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

1272404 is a wasteful number, since it uses less digits than its factorization.

1272404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607 (or 1605 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 1272404 is about 1128.0088652134. The cubic root of 1272404 is about 108.3615001053.

Subtracting from 1272404 its sum of digits (20), we obtain a square (1272384 = 1128²).

The spelling of 1272404 in words is "one million, two hundred seventy-two thousand, four hundred four".