1142890 has 32 divisors (see below), whose sum is σ = 2436480. Its totient is φ = 377664.

The previous prime is 1142881. The next prime is 1142891. The reversal of 1142890 is 982411.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1749 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (76140).

2^1142890 is an apocalyptic number.

1142890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1142890 is an abundant number, since it is smaller than the sum of its proper divisors (1293590).

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

1142890 is a wasteful number, since it uses less digits than its factorization.

1142890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1142890 is about 1069.0603350607. The cubic root of 1142890 is about 104.5525936581.

The spelling of 1142890 in words is "one million, one hundred forty-two thousand, eight hundred ninety".