1273720 has 32 divisors (see below), whose sum is σ = 3276000. Its totient is φ = 436608.

The previous prime is 1273693. The next prime is 1273721. The reversal of 1273720 is 273721.

It is a junction number, because it is equal to n+sod(n) for n = 1273691 and 1273700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1995 + ... + 2554.

It is an arithmetic number, because the mean of its divisors is an integer number (102375).

2^1273720 is an apocalyptic number.

1273720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1273720 is an abundant number, since it is smaller than the sum of its proper divisors (2002280).

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

1273720 is a wasteful number, since it uses less digits than its factorization.

1273720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4567 (or 4563 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 1273720 is about 1128.5920432114. The cubic root of 1273720 is about 108.3988453193.

Subtracting from 1273720 its reverse (273721), we obtain a palindrome (999999).

The spelling of 1273720 in words is "one million, two hundred seventy-three thousand, seven hundred twenty".