1161423142 has 16 divisors (see below), whose sum is σ = 1932724800. Its totient is φ = 518971240.

The previous prime is 1161423097. The next prime is 1161423143. The reversal of 1161423142 is 2413241611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161423143) 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, 446092 + ... + 448687.

It is an arithmetic number, because the mean of its divisors is an integer number (120795300).

Almost surely, 2^1161423142 is an apocalyptic number.

1161423142 is a deficient number, since it is larger than the sum of its proper divisors (771301658).

1161423142 is a wasteful number, since it uses less digits than its factorization.

1161423142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894851.

The product of its digits is 1152, while the sum is 25.

The square root of 1161423142 is about 34079.6587717659. The cubic root of 1161423142 is about 1051.1470886415.

Adding to 1161423142 its reverse (2413241611), we get a palindrome (3574664753).

The spelling of 1161423142 in words is "one billion, one hundred sixty-one million, four hundred twenty-three thousand, one hundred forty-two".