1556142 has 48 divisors (see below), whose sum is σ = 3720960. Its totient is φ = 432432.

The previous prime is 1556117. The next prime is 1556147. The reversal of 1556142 is 2416551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19659 + ... + 19737.

It is an arithmetic number, because the mean of its divisors is an integer number (77520).

2^1556142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1556142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1860480).

1556142 is an abundant number, since it is smaller than the sum of its proper divisors (2164818).

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

1556142 is a wasteful number, since it uses less digits than its factorization.

1556142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 158 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 1556142 is about 1247.4542075764. The cubic root of 1556142 is about 115.8821136895.

The spelling of 1556142 in words is "one million, five hundred fifty-six thousand, one hundred forty-two".