1561158 has 24 divisors (see below), whose sum is σ = 3462888. Its totient is φ = 508032.

The previous prime is 1561151. The next prime is 1561159. The reversal of 1561158 is 8511651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235 + ... + 1782.

It is an arithmetic number, because the mean of its divisors is an integer number (144287).

2^1561158 is an apocalyptic number.

1561158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1561158 is an abundant number, since it is smaller than the sum of its proper divisors (1901730).

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

1561158 is a wasteful number, since it uses less digits than its factorization.

1561158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068 (or 2065 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 1561158 is about 1249.4630846888. The cubic root of 1561158 is about 116.0064899262.

The spelling of 1561158 in words is "one million, five hundred sixty-one thousand, one hundred fifty-eight".