1258761587 has 2 divisors, whose sum is σ = 1258761588. Its totient is φ = 1258761586.

The previous prime is 1258761563. The next prime is 1258761601. The reversal of 1258761587 is 7851678521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1258761587 - 2²⁰ = 1257713011 is a prime.

It is not a weakly prime, because it can be changed into another prime (1258761527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629380793 + 629380794.

It is an arithmetic number, because the mean of its divisors is an integer number (629380794).

Almost surely, 2^1258761587 is an apocalyptic number.

1258761587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258761587 is an equidigital number, since it uses as much as digits as its factorization.

1258761587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 940800, while the sum is 50.

The square root of 1258761587 is about 35479.0302432296. The cubic root of 1258761587 is about 1079.7283230112.

The spelling of 1258761587 in words is "one billion, two hundred fifty-eight million, seven hundred sixty-one thousand, five hundred eighty-seven".