1270920 has 128 divisors (see below), whose sum is σ = 4665600. Its totient is φ = 270336.

The previous prime is 1270909. The next prime is 1270933. The reversal of 1270920 is 290721.

1270920 = T₂₇ + T₂₈ + ... + T₁₉₆.

1270920 = 46² + 47² + ... + 157².

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14236 + ... + 14324.

It is an arithmetic number, because the mean of its divisors is an integer number (36450).

2^1270920 is an apocalyptic number.

1270920 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 1270920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2332800).

1270920 is an abundant number, since it is smaller than the sum of its proper divisors (3394680).

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

1270920 is a wasteful number, since it uses less digits than its factorization.

1270920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 1270920 is about 1127.3508770565. The cubic root of 1270920 is about 108.3193565137.

The spelling of 1270920 in words is "one million, two hundred seventy thousand, nine hundred twenty".