1540980 has 72 divisors (see below), whose sum is σ = 5346432. Its totient is φ = 351936.

The previous prime is 1540969. The next prime is 1540997. The reversal of 1540980 is 890451.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 649 + ... + 1871.

It is an arithmetic number, because the mean of its divisors is an integer number (74256).

2^1540980 is an apocalyptic number.

1540980 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 1540980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2673216).

1540980 is an abundant number, since it is smaller than the sum of its proper divisors (3805452).

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

1540980 is a wasteful number, since it uses less digits than its factorization.

1540980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245 (or 1240 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1540980 is about 1241.3621550539. The cubic root of 1540980 is about 115.5045255999.

The spelling of 1540980 in words is "one million, five hundred forty thousand, nine hundred eighty".