1555242546 has 64 divisors (see below), whose sum is σ = 3698472960. Its totient is φ = 429771840.

The previous prime is 1555242529. The next prime is 1555242553. The reversal of 1555242546 is 6452425551.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60295 + ... + 82133.

It is an arithmetic number, because the mean of its divisors is an integer number (57788640).

Almost surely, 2^1555242546 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1555242546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1849236480).

1555242546 is an abundant number, since it is smaller than the sum of its proper divisors (2143230414).

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

1555242546 is a wasteful number, since it uses less digits than its factorization.

1555242546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21951.

The product of its digits is 240000, while the sum is 39.

The square root of 1555242546 is about 39436.5635673292. The cubic root of 1555242546 is about 1158.5978266854.

The spelling of 1555242546 in words is "one billion, five hundred fifty-five million, two hundred forty-two thousand, five hundred forty-six".