1187058157 has 4 divisors (see below), whose sum is σ = 1188976480. Its totient is φ = 1185139836.

The previous prime is 1187058143. The next prime is 1187058217. The reversal of 1187058157 is 7518507811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1187058157 - 2¹¹ = 1187056109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187058857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 958233 + ... + 959470.

It is an arithmetic number, because the mean of its divisors is an integer number (297244120).

Almost surely, 2^1187058157 is an apocalyptic number.

It is an amenable number.

1187058157 is a deficient number, since it is larger than the sum of its proper divisors (1918323).

1187058157 is an equidigital number, since it uses as much as digits as its factorization.

1187058157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918322.

The product of its (nonzero) digits is 78400, while the sum is 43.

The square root of 1187058157 is about 34453.7103517168. The cubic root of 1187058157 is about 1058.8245415956.

The spelling of 1187058157 in words is "one billion, one hundred eighty-seven million, fifty-eight thousand, one hundred fifty-seven".