111445402 has 4 divisors (see below), whose sum is σ = 167168106. Its totient is φ = 55722700.

The previous prime is 111445357. The next prime is 111445409. The reversal of 111445402 is 204544111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204544111 = 11173 ⋅18307.

It can be written as a sum of positive squares in only one way, i.e., 111323601 + 121801 = 10551^2 + 349^2 .

It is not an unprimeable number, because it can be changed into a prime (111445409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27861349 + ... + 27861352.

Almost surely, 2^111445402 is an apocalyptic number.

111445402 is a deficient number, since it is larger than the sum of its proper divisors (55722704).

111445402 is an equidigital number, since it uses as much as digits as its factorization.

111445402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55722703.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 111445402 is about 10556.7704341811. The cubic root of 111445402 is about 481.2315049507.

Adding to 111445402 its reverse (204544111), we get a palindrome (315989513).

The spelling of 111445402 in words is "one hundred eleven million, four hundred forty-five thousand, four hundred two".