1555042141 has 4 divisors (see below), whose sum is σ = 1588128192. Its totient is φ = 1521956092.

The previous prime is 1555042129. The next prime is 1555042163. The reversal of 1555042141 is 1412405551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1555042141 - 2²⁷ = 1420824413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555040141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16542955 + ... + 16543048.

It is an arithmetic number, because the mean of its divisors is an integer number (397032048).

Almost surely, 2^1555042141 is an apocalyptic number.

It is an amenable number.

1555042141 is a deficient number, since it is larger than the sum of its proper divisors (33086051).

1555042141 is an equidigital number, since it uses as much as digits as its factorization.

1555042141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33086050.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 1555042141 is about 39434.0226327470. The cubic root of 1555042141 is about 1158.5480597917.

Adding to 1555042141 its reverse (1412405551), we get a palindrome (2967447692).

The spelling of 1555042141 in words is "one billion, five hundred fifty-five million, forty-two thousand, one hundred forty-one".