1377280 has 44 divisors (see below), whose sum is σ = 3316140. Its totient is φ = 548864.

The previous prime is 1377269. The next prime is 1377281. The reversal of 1377280 is 827731.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 262144 + 1115136 = 512^2 + 1056^2 .

It is not an unprimeable number, because it can be changed into a prime (1377281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4986 + ... + 5254.

2^1377280 is an apocalyptic number.

1377280 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 1377280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658070).

1377280 is an abundant number, since it is smaller than the sum of its proper divisors (1938860).

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

1377280 is an equidigital number, since it uses as much as digits as its factorization.

1377280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 1377280 is about 1173.5757325371. The cubic root of 1377280 is about 111.2604333101.

The spelling of 1377280 in words is "one million, three hundred seventy-seven thousand, two hundred eighty".