1157861 has 4 divisors (see below), whose sum is σ = 1184832. Its totient is φ = 1130892.

The previous prime is 1157851. The next prime is 1157869. The reversal of 1157861 is 1687511.

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 1157861 - 2¹⁴ = 1141477 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 (1157869) 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 3 ways as a sum of consecutive naturals, for example, 13421 + ... + 13506.

It is an arithmetic number, because the mean of its divisors is an integer number (296208).

2^1157861 is an apocalyptic number.

It is an amenable number.

1157861 is a deficient number, since it is larger than the sum of its proper divisors (26971).

1157861 is an equidigital number, since it uses as much as digits as its factorization.

1157861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26970.

The product of its digits is 1680, while the sum is 29.

The square root of 1157861 is about 1076.0394974163. The cubic root of 1157861 is about 105.0071348137.

The spelling of 1157861 in words is "one million, one hundred fifty-seven thousand, eight hundred sixty-one".