1375520 has 24 divisors (see below), whose sum is σ = 3250044. Its totient is φ = 550144.

The previous prime is 1375513. The next prime is 1375531. The reversal of 1375520 is 255731.

1375520 = T₁₁₉ + T₁₂₀ + ... + T₂₁₄.

It can be written as a sum of positive squares in 2 ways, for example, as 1373584 + 1936 = 1172^2 + 44^2 .

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, 4139 + ... + 4458.

2^1375520 is an apocalyptic number.

1375520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1375520 is an abundant number, since it is smaller than the sum of its proper divisors (1874524).

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

1375520 is an equidigital number, since it uses as much as digits as its factorization.

1375520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8612 (or 8604 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 1375520 is about 1172.8256477414. The cubic root of 1375520 is about 111.2130205756.

The spelling of 1375520 in words is "one million, three hundred seventy-five thousand, five hundred twenty".