1012342157 has 2 divisors, whose sum is σ = 1012342158. Its totient is φ = 1012342156.

The previous prime is 1012342151. The next prime is 1012342213. The reversal of 1012342157 is 7512432101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 998939236 + 13402921 = 31606^2 + 3661^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012342157 - 2⁴ = 1012342141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012342151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506171078 + 506171079.

It is an arithmetic number, because the mean of its divisors is an integer number (506171079).

Almost surely, 2^1012342157 is an apocalyptic number.

It is an amenable number.

1012342157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012342157 is an equidigital number, since it uses as much as digits as its factorization.

1012342157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1012342157 is about 31817.3247932632. The cubic root of 1012342157 is about 1004.0972420139.

Adding to 1012342157 its reverse (7512432101), we get a palindrome (8524774258).

The spelling of 1012342157 in words is "one billion, twelve million, three hundred forty-two thousand, one hundred fifty-seven".