1280370 has 96 divisors (see below), whose sum is σ = 3907008. Its totient is φ = 266112.

The previous prime is 1280333. The next prime is 1280371. The reversal of 1280370 is 730821.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280371) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19077 + ... + 19143.

It is an arithmetic number, because the mean of its divisors is an integer number (40698).

2^1280370 is an apocalyptic number.

1280370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1953504).

1280370 is an abundant number, since it is smaller than the sum of its proper divisors (2626638).

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

1280370 is a wasteful number, since it uses less digits than its factorization.

1280370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1280370 is about 1131.5343565266. The cubic root of 1280370 is about 108.5871654738.

The spelling of 1280370 in words is "one million, two hundred eighty thousand, three hundred seventy".