1555242545 has 8 divisors (see below), whose sum is σ = 1911810600. Its totient is φ = 1213847680.

The previous prime is 1555242529. The next prime is 1555242553. The reversal of 1555242545 is 5452425551.

It can be written as a sum of positive squares in 4 ways, for example, as 174451264 + 1380791281 = 13208^2 + 37159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1555242545 - 2⁴ = 1555242529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1555242499 and 1555242508.

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, 3793070 + ... + 3793479.

It is an arithmetic number, because the mean of its divisors is an integer number (238976325).

Almost surely, 2^1555242545 is an apocalyptic number.

It is an amenable number.

1555242545 is a deficient number, since it is larger than the sum of its proper divisors (356568055).

1555242545 is an equidigital number, since it uses as much as digits as its factorization.

1555242545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7586595.

The product of its digits is 200000, while the sum is 38.

The square root of 1555242545 is about 39436.5635546507. The cubic root of 1555242545 is about 1158.5978264371.

The spelling of 1555242545 in words is "one billion, five hundred fifty-five million, two hundred forty-two thousand, five hundred forty-five".