1401980 has 12 divisors (see below), whose sum is σ = 2944200. Its totient is φ = 560784.

The previous prime is 1401979. The next prime is 1401989. The reversal of 1401980 is 891041.

1401980 is a modest number, since divided by 1980 gives 140 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35030 + ... + 35069.

It is an arithmetic number, because the mean of its divisors is an integer number (245350).

2^1401980 is an apocalyptic number.

1401980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401980 is an abundant number, since it is smaller than the sum of its proper divisors (1542220).

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

1401980 is a wasteful number, since it uses less digits than its factorization.

1401980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70108 (or 70106 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1401980 is about 1184.0523637069. The cubic root of 1401980 is about 111.9216075583.

The spelling of 1401980 in words is "one million, four hundred one thousand, nine hundred eighty".