1012440157 has 2 divisors, whose sum is σ = 1012440158. Its totient is φ = 1012440156.

The previous prime is 1012440133. The next prime is 1012440173. The reversal of 1012440157 is 7510442101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 633982041 + 378458116 = 25179^2 + 19454^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012440157 - 2¹¹ = 1012438109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012440127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506220078 + 506220079.

It is an arithmetic number, because the mean of its divisors is an integer number (506220079).

Almost surely, 2^1012440157 is an apocalyptic number.

It is an amenable number.

1012440157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012440157 is an equidigital number, since it uses as much as digits as its factorization.

1012440157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1012440157 is about 31818.8647974751. The cubic root of 1012440157 is about 1004.1296415848.

Adding to 1012440157 its reverse (7510442101), we get a palindrome (8522882258).

The spelling of 1012440157 in words is "one billion, twelve million, four hundred forty thousand, one hundred fifty-seven".