1158642 has 24 divisors (see below), whose sum is σ = 2555280. Its totient is φ = 379320.

The previous prime is 1158629. The next prime is 1158643. The reversal of 1158642 is 2468511.

1158642 is a `hidden beast` number, since 1 + 15 + 8 + 642 = 666.

It is not an unprimeable number, because it can be changed into a prime (1158643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 517 + ... + 1607.

It is an arithmetic number, because the mean of its divisors is an integer number (106470).

2^1158642 is an apocalyptic number.

1158642 is an abundant number, since it is smaller than the sum of its proper divisors (1396638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1158642 is a wasteful number, since it uses less digits than its factorization.

1158642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158 (or 1155 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1158642 is about 1076.4023411346. The cubic root of 1158642 is about 105.0307392994.

It can be divided in two parts, 11586 and 42, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 1158642 in words is "one million, one hundred fifty-eight thousand, six hundred forty-two".