1555142 has 4 divisors (see below), whose sum is σ = 2332716. Its totient is φ = 777570.

The previous prime is 1555133. The next prime is 1555153. The reversal of 1555142 is 2415551.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388784 + ... + 388787.

It is an arithmetic number, because the mean of its divisors is an integer number (583179).

2^1555142 is an apocalyptic number.

1555142 is a deficient number, since it is larger than the sum of its proper divisors (777574).

1555142 is an equidigital number, since it uses as much as digits as its factorization.

1555142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777573.

The product of its digits is 1000, while the sum is 23.

The square root of 1555142 is about 1247.0533268469. The cubic root of 1555142 is about 115.8572858471.

The spelling of 1555142 in words is "one million, five hundred fifty-five thousand, one hundred forty-two".