1045158491 has 4 divisors (see below), whose sum is σ = 1125555312. Its totient is φ = 964761672.

The previous prime is 1045158467. The next prime is 1045158503. The reversal of 1045158491 is 1948515401.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1045158491 - 2²² = 1040964187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1045158421) 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 3 ways as a sum of consecutive naturals, for example, 40198391 + ... + 40198416.

It is an arithmetic number, because the mean of its divisors is an integer number (281388828).

Almost surely, 2^1045158491 is an apocalyptic number.

1045158491 is a deficient number, since it is larger than the sum of its proper divisors (80396821).

1045158491 is an equidigital number, since it uses as much as digits as its factorization.

1045158491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80396820.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 1045158491 is about 32328.9110704335. The cubic root of 1045158491 is about 1014.8317616115.

The spelling of 1045158491 in words is "one billion, forty-five million, one hundred fifty-eight thousand, four hundred ninety-one".