1260215587 has 2 divisors, whose sum is σ = 1260215588. Its totient is φ = 1260215586.

The previous prime is 1260215569. The next prime is 1260215591. The reversal of 1260215587 is 7855120621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1260215587 is a prime.

It is not a weakly prime, because it can be changed into another prime (1260215507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630107793 + 630107794.

It is an arithmetic number, because the mean of its divisors is an integer number (630107794).

Almost surely, 2^1260215587 is an apocalyptic number.

1260215587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260215587 is an equidigital number, since it uses as much as digits as its factorization.

1260215587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 1260215587 is about 35499.5153065503. The cubic root of 1260215587 is about 1080.1438957218.

The spelling of 1260215587 in words is "one billion, two hundred sixty million, two hundred fifteen thousand, five hundred eighty-seven".