1440000157 has 2 divisors, whose sum is σ = 1440000158. Its totient is φ = 1440000156.

The previous prime is 1440000143. The next prime is 1440000167. The reversal of 1440000157 is 7510000441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1426648441 + 13351716 = 37771^2 + 3654^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440000157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440000137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720000078 + 720000079.

It is an arithmetic number, because the mean of its divisors is an integer number (720000079).

Almost surely, 2^1440000157 is an apocalyptic number.

It is an amenable number.

1440000157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440000157 is an equidigital number, since it uses as much as digits as its factorization.

1440000157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 1440000157 is about 37947.3339906771. Note that the first 3 decimals coincide. The cubic root of 1440000157 is about 1129.2432756969.

Adding to 1440000157 its reverse (7510000441), we get a palindrome (8950000598).

The spelling of 1440000157 in words is "one billion, four hundred forty million, one hundred fifty-seven", and thus it is an aban number.