1171158542 has 4 divisors (see below), whose sum is σ = 1756737816. Its totient is φ = 585579270.

The previous prime is 1171158497. The next prime is 1171158553. The reversal of 1171158542 is 2458511711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2458511711 = 229 ⋅10735859.

It is a super-2 number, since 2×1171158542² = 2743224660999131528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 292789634 + ... + 292789637.

It is an arithmetic number, because the mean of its divisors is an integer number (439184454).

Almost surely, 2^1171158542 is an apocalyptic number.

1171158542 is a deficient number, since it is larger than the sum of its proper divisors (585579274).

1171158542 is an equidigital number, since it uses as much as digits as its factorization.

1171158542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585579273.

The product of its digits is 11200, while the sum is 35.

The square root of 1171158542 is about 34222.1937052551. The cubic root of 1171158542 is about 1054.0759312642.

The spelling of 1171158542 in words is "one billion, one hundred seventy-one million, one hundred fifty-eight thousand, five hundred forty-two".