1045406155 has 4 divisors (see below), whose sum is σ = 1254487392. Its totient is φ = 836324920.

The previous prime is 1045406147. The next prime is 1045406183. The reversal of 1045406155 is 5516045401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5516045401 = 19 ⋅290318179.

It is not a de Polignac number, because 1045406155 - 2³ = 1045406147 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 104540611 + ... + 104540620.

It is an arithmetic number, because the mean of its divisors is an integer number (313621848).

Almost surely, 2^1045406155 is an apocalyptic number.

1045406155 is a deficient number, since it is larger than the sum of its proper divisors (209081237).

1045406155 is an equidigital number, since it uses as much as digits as its factorization.

1045406155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209081236.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 1045406155 is about 32332.7412231008. The cubic root of 1045406155 is about 1014.9119145088.

The spelling of 1045406155 in words is "one billion, forty-five million, four hundred six thousand, one hundred fifty-five".