1186661742 has 32 divisors (see below), whose sum is σ = 2742854400. Its totient is φ = 335235648.

The previous prime is 1186661689. The next prime is 1186661767. The reversal of 1186661742 is 2471666811.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1186661694 and 1186661703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154992 + ... + 162467.

It is an arithmetic number, because the mean of its divisors is an integer number (85714200).

Almost surely, 2^1186661742 is an apocalyptic number.

1186661742 is an abundant number, since it is smaller than the sum of its proper divisors (1556192658).

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

1186661742 is a wasteful number, since it uses less digits than its factorization.

1186661742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317560.

The product of its digits is 96768, while the sum is 42.

The square root of 1186661742 is about 34447.9570076369. The cubic root of 1186661742 is about 1058.7066645677.

The spelling of 1186661742 in words is "one billion, one hundred eighty-six million, six hundred sixty-one thousand, seven hundred forty-two".