1125402155 has 4 divisors (see below), whose sum is σ = 1350482592. Its totient is φ = 900321720.

The previous prime is 1125402133. The next prime is 1125402181. The reversal of 1125402155 is 5512045211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5512045211 = 131 ⋅42076681.

It is a de Polignac number, because none of the positive numbers 2^k-1125402155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112540211 + ... + 112540220.

It is an arithmetic number, because the mean of its divisors is an integer number (337620648).

Almost surely, 2^1125402155 is an apocalyptic number.

1125402155 is a deficient number, since it is larger than the sum of its proper divisors (225080437).

1125402155 is an equidigital number, since it uses as much as digits as its factorization.

1125402155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225080436.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1125402155 is about 33547.0140996185. The cubic root of 1125402155 is about 1040.1658250745.

Adding to 1125402155 its reverse (5512045211), we get a palindrome (6637447366).

The spelling of 1125402155 in words is "one billion, one hundred twenty-five million, four hundred two thousand, one hundred fifty-five".