1162142021 has 2 divisors, whose sum is σ = 1162142022. Its totient is φ = 1162142020.

The previous prime is 1162142017. The next prime is 1162142071. The reversal of 1162142021 is 1202412611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 782320900 + 379821121 = 27970^2 + 19489^2 .

It is an emirp because it is prime and its reverse (1202412611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1162142021 - 2² = 1162142017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1162141984 and 1162142002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1162142071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581071010 + 581071011.

It is an arithmetic number, because the mean of its divisors is an integer number (581071011).

Almost surely, 2^1162142021 is an apocalyptic number.

It is an amenable number.

1162142021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1162142021 is an equidigital number, since it uses as much as digits as its factorization.

1162142021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1162142021 is about 34090.2041795000. The cubic root of 1162142021 is about 1051.3639179457.

Adding to 1162142021 its reverse (1202412611), we get a palindrome (2364554632).

The spelling of 1162142021 in words is "one billion, one hundred sixty-two million, one hundred forty-two thousand, twenty-one".