1556040 has 32 divisors (see below), whose sum is σ = 4668480. Its totient is φ = 414912.

The previous prime is 1556039. The next prime is 1556059. The reversal of 1556040 is 406551.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1555998 and 1556016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6364 + ... + 6603.

It is an arithmetic number, because the mean of its divisors is an integer number (145890).

2^1556040 is an apocalyptic number.

1556040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1556040 is an abundant number, since it is smaller than the sum of its proper divisors (3112440).

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

1556040 is a wasteful number, since it uses less digits than its factorization.

1556040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12981 (or 12977 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1556040 is about 1247.4133236422. The cubic root of 1556040 is about 115.8795817368.

The spelling of 1556040 in words is "one million, five hundred fifty-six thousand, forty".