111961942 has 4 divisors (see below), whose sum is σ = 167942916. Its totient is φ = 55980970.

The previous prime is 111961931. The next prime is 111961951. The reversal of 111961942 is 249169111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 249169111 = 14479 ⋅17209.

It is a super-2 number, since 2×111961942² = 25070952912822728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111961898 and 111961907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27990484 + ... + 27990487.

It is an arithmetic number, because the mean of its divisors is an integer number (41985729).

Almost surely, 2^111961942 is an apocalyptic number.

111961942 is a deficient number, since it is larger than the sum of its proper divisors (55980974).

111961942 is an equidigital number, since it uses as much as digits as its factorization.

111961942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55980973.

The product of its digits is 3888, while the sum is 34.

The square root of 111961942 is about 10581.2070199954. The cubic root of 111961942 is about 481.9738483197.

The spelling of 111961942 in words is "one hundred eleven million, nine hundred sixty-one thousand, nine hundred forty-two".