1142265161 has 4 divisors (see below), whose sum is σ = 1202384400. Its totient is φ = 1082145924.

The previous prime is 1142265127. The next prime is 1142265209. The reversal of 1142265161 is 1615622411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1142265161 - 2³⁰ = 68523337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142265101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30059591 + ... + 30059628.

It is an arithmetic number, because the mean of its divisors is an integer number (300596100).

Almost surely, 2^1142265161 is an apocalyptic number.

It is an amenable number.

1142265161 is a deficient number, since it is larger than the sum of its proper divisors (60119239).

1142265161 is an equidigital number, since it uses as much as digits as its factorization.

1142265161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60119238.

The product of its digits is 2880, while the sum is 29.

The square root of 1142265161 is about 33797.4135252981. The cubic root of 1142265161 is about 1045.3353657557.

Adding to 1142265161 its reverse (1615622411), we get a palindrome (2757887572).

The spelling of 1142265161 in words is "one billion, one hundred forty-two million, two hundred sixty-five thousand, one hundred sixty-one".