1587157123 has 2 divisors, whose sum is σ = 1587157124. Its totient is φ = 1587157122.

The previous prime is 1587157097. The next prime is 1587157129. The reversal of 1587157123 is 3217517851.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1587157123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1587157129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 793578561 + 793578562.

It is an arithmetic number, because the mean of its divisors is an integer number (793578562).

Almost surely, 2^1587157123 is an apocalyptic number.

1587157123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1587157123 is an equidigital number, since it uses as much as digits as its factorization.

1587157123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58800, while the sum is 40.

The square root of 1587157123 is about 39839.1405906302. The cubic root of 1587157123 is about 1166.4692847122.

The spelling of 1587157123 in words is "one billion, five hundred eighty-seven million, one hundred fifty-seven thousand, one hundred twenty-three".