1145861858 has 4 divisors (see below), whose sum is σ = 1718792790. Its totient is φ = 572930928.

The previous prime is 1145861797. The next prime is 1145861869. The reversal of 1145861858 is 8581685411.

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

It can be written as a sum of positive squares in only one way, i.e., 818360449 + 327501409 = 28607^2 + 18097^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286465463 + ... + 286465466.

Almost surely, 2^1145861858 is an apocalyptic number.

1145861858 is a deficient number, since it is larger than the sum of its proper divisors (572930932).

1145861858 is an equidigital number, since it uses as much as digits as its factorization.

1145861858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572930931.

The product of its digits is 307200, while the sum is 47.

The square root of 1145861858 is about 33850.5813539443. The cubic root of 1145861858 is about 1046.4313796022.

The spelling of 1145861858 in words is "one billion, one hundred forty-five million, eight hundred sixty-one thousand, eight hundred fifty-eight".