1142140 has 12 divisors (see below), whose sum is σ = 2398536. Its totient is φ = 456848.

The previous prime is 1142131. The next prime is 1142159. The reversal of 1142140 is 412411.

It is a self number, because there is not a number n which added to its sum of digits gives 1142140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28534 + ... + 28573.

It is an arithmetic number, because the mean of its divisors is an integer number (199878).

2^1142140 is an apocalyptic number.

1142140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142140 is an abundant number, since it is smaller than the sum of its proper divisors (1256396).

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

1142140 is a wasteful number, since it uses less digits than its factorization.

1142140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57116 (or 57114 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1142140 is about 1068.7095021567. The cubic root of 1142140 is about 104.5297184312.

Adding to 1142140 its reverse (412411), we get a palindrome (1554551).

The spelling of 1142140 in words is "one million, one hundred forty-two thousand, one hundred forty".