1270440 has 48 divisors (see below), whose sum is σ = 4130100. Its totient is φ = 338688.

The previous prime is 1270433. The next prime is 1270441. The reversal of 1270440 is 440721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1153476 + 116964 = 1074^2 + 342^2 .

It is a super-2 number, since 2×1270440² = 3228035587200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1270441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1405 + ... + 2124.

2^1270440 is an apocalyptic number.

1270440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1270440 is an abundant number, since it is smaller than the sum of its proper divisors (2859660).

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

1270440 is a wasteful number, since it uses less digits than its factorization.

1270440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546 (or 3539 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 1270440 is about 1127.1379684848. The cubic root of 1270440 is about 108.3057181420.

The spelling of 1270440 in words is "one million, two hundred seventy thousand, four hundred forty".