1273920 has 56 divisors (see below), whose sum is σ = 4047744. Its totient is φ = 339456.

The previous prime is 1273919. The next prime is 1273933. The reversal of 1273920 is 293721.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297 + ... + 1623.

2^1273920 is an apocalyptic number.

1273920 is a gapful number since it is divisible by the number (10) 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 1273920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2023872).

1273920 is an abundant number, since it is smaller than the sum of its proper divisors (2773824).

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

1273920 is a wasteful number, since it uses less digits than its factorization.

1273920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 1273920 is about 1128.6806457098. The cubic root of 1273920 is about 108.4045186317.

The spelling of 1273920 in words is "one million, two hundred seventy-three thousand, nine hundred twenty".