1165556242 has 4 divisors (see below), whose sum is σ = 1748334366. Its totient is φ = 582778120.

The previous prime is 1165556239. The next prime is 1165556263. The reversal of 1165556242 is 2426555611.

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., 702833121 + 462723121 = 26511^2 + 21511^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291389059 + ... + 291389062.

Almost surely, 2^1165556242 is an apocalyptic number.

1165556242 is a deficient number, since it is larger than the sum of its proper divisors (582778124).

1165556242 is an equidigital number, since it uses as much as digits as its factorization.

1165556242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582778123.

The product of its digits is 72000, while the sum is 37.

The square root of 1165556242 is about 34140.2437308230. The cubic root of 1165556242 is about 1052.3925011371.

The spelling of 1165556242 in words is "one billion, one hundred sixty-five million, five hundred fifty-six thousand, two hundred forty-two".