1401280 has 56 divisors (see below), whose sum is σ = 3474720. Its totient is φ = 537600.

The previous prime is 1401263. The next prime is 1401287. The reversal of 1401280 is 821041.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9205 + ... + 9355.

2^1401280 is an apocalyptic number.

1401280 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 1401280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737360).

1401280 is an abundant number, since it is smaller than the sum of its proper divisors (2073440).

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

1401280 is a wasteful number, since it uses less digits than its factorization.

1401280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1401280 is about 1183.7567317654. The cubic root of 1401280 is about 111.9029772003.

It can be divided in two parts, 1401 and 280, that added together give a square (1681 = 41²).

The spelling of 1401280 in words is "one million, four hundred one thousand, two hundred eighty".