1100142 has 20 divisors (see below), whose sum is σ = 2465496. Its totient is φ = 366660.

The previous prime is 1100131. The next prime is 1100147. The reversal of 1100142 is 2410011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100147) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3234 + ... + 3557.

2^1100142 is an apocalyptic number.

1100142 is an abundant number, since it is smaller than the sum of its proper divisors (1365354).

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

1100142 is an equidigital number, since it uses as much as digits as its factorization.

1100142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6805 (or 6796 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1100142 is about 1048.8765418294. The cubic root of 1100142 is about 103.2324532871.

Adding to 1100142 its reverse (2410011), we get a palindrome (3510153).

The spelling of 1100142 in words is "one million, one hundred thousand, one hundred forty-two".