1142720 has 28 divisors (see below), whose sum is σ = 2721864. Its totient is φ = 456960.

The previous prime is 1142707. The next prime is 1142737. The reversal of 1142720 is 272411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1466 + ... + 2105.

2^1142720 is an apocalyptic number.

1142720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142720 is an abundant number, since it is smaller than the sum of its proper divisors (1579144).

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

1142720 is an equidigital number, since it uses as much as digits as its factorization.

1142720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3588 (or 3578 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1142720 is about 1068.9808230272. The cubic root of 1142720 is about 104.5474094840.

The spelling of 1142720 in words is "one million, one hundred forty-two thousand, seven hundred twenty".