1181642 has 16 divisors (see below), whose sum is σ = 2210112. Its totient is φ = 460320.

The previous prime is 1181633. The next prime is 1181647. The reversal of 1181642 is 2461811.

It is not an unprimeable number, because it can be changed into a prime (1181647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3683 + ... + 3990.

It is an arithmetic number, because the mean of its divisors is an integer number (138132).

2^1181642 is an apocalyptic number.

1181642 is a deficient number, since it is larger than the sum of its proper divisors (1028470).

1181642 is a wasteful number, since it uses less digits than its factorization.

1181642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7693.

The product of its digits is 384, while the sum is 23.

The square root of 1181642 is about 1087.0335781382. The cubic root of 1181642 is about 105.7211729834.

It can be divided in two parts, 118164 and 2, that multiplied together give a triangular number (236328 = T₆₈₇).

The spelling of 1181642 in words is "one million, one hundred eighty-one thousand, six hundred forty-two".