1115943154 has 4 divisors (see below), whose sum is σ = 1673914734. Its totient is φ = 557971576.

The previous prime is 1115943149. The next prime is 1115943173. The reversal of 1115943154 is 4513495111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4513495111 = 421 ⋅10720891.

It can be written as a sum of positive squares in only one way, i.e., 1107092529 + 8850625 = 33273^2 + 2975^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278985787 + ... + 278985790.

Almost surely, 2^1115943154 is an apocalyptic number.

1115943154 is a deficient number, since it is larger than the sum of its proper divisors (557971580).

1115943154 is an equidigital number, since it uses as much as digits as its factorization.

1115943154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557971579.

The product of its digits is 10800, while the sum is 34.

The square root of 1115943154 is about 33405.7353458953. The cubic root of 1115943154 is about 1037.2434254785.

The spelling of 1115943154 in words is "one billion, one hundred fifteen million, nine hundred forty-three thousand, one hundred fifty-four".