1045155251 has 6 divisors (see below), whose sum is σ = 1215792900. Its totient is φ = 895847316.

The previous prime is 1045155239. The next prime is 1045155253. The reversal of 1045155251 is 1525515401.

It is not a de Polignac number, because 1045155251 - 2⁶ = 1045155187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1045155253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10664801 + ... + 10664898.

It is an arithmetic number, because the mean of its divisors is an integer number (202632150).

Almost surely, 2^1045155251 is an apocalyptic number.

1045155251 is a deficient number, since it is larger than the sum of its proper divisors (170637649).

1045155251 is an equidigital number, since it uses as much as digits as its factorization.

1045155251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21329713 (or 21329706 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 29.

The square root of 1045155251 is about 32328.8609604483. The cubic root of 1045155251 is about 1014.8307129481.

The spelling of 1045155251 in words is "one billion, forty-five million, one hundred fifty-five thousand, two hundred fifty-one".