1231142 has 16 divisors (see below), whose sum is σ = 2037312. Its totient is φ = 553320.

The previous prime is 1231141. The next prime is 1231171. The reversal of 1231142 is 2411321.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2093 + ... + 2615.

It is an arithmetic number, because the mean of its divisors is an integer number (127332).

2^1231142 is an apocalyptic number.

1231142 is a deficient number, since it is larger than the sum of its proper divisors (806170).

1231142 is a wasteful number, since it uses less digits than its factorization.

1231142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643.

The product of its digits is 48, while the sum is 14.

The square root of 1231142 is about 1109.5683845532. The cubic root of 1231142 is about 107.1772762223.

Adding to 1231142 its reverse (2411321), we get a palindrome (3642463).

The spelling of 1231142 in words is "one million, two hundred thirty-one thousand, one hundred forty-two".