1142990 has 8 divisors (see below), whose sum is σ = 2057400. Its totient is φ = 457192.

The previous prime is 1142971. The next prime is 1143013. The reversal of 1142990 is 992411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1142990² = 2612852280200, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

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, 57140 + ... + 57159.

It is an arithmetic number, because the mean of its divisors is an integer number (257175).

2^1142990 is an apocalyptic number.

1142990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1142990 is a deficient number, since it is larger than the sum of its proper divisors (914410).

1142990 is a wasteful number, since it uses less digits than its factorization.

1142990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114306.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1142990 is about 1069.1071040827. The cubic root of 1142990 is about 104.5556429321. Note that the first 3 decimals are identical.

The spelling of 1142990 in words is "one million, one hundred forty-two thousand, nine hundred ninety".