71261587 has 2 divisors, whose sum is σ = 71261588. Its totient is φ = 71261586.

The previous prime is 71261579. The next prime is 71261611. The reversal of 71261587 is 78516217.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71261587 - 2³ = 71261579 is a prime.

It is a super-3 number, since 3×71261587³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (71261507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35630793 + 35630794.

It is an arithmetic number, because the mean of its divisors is an integer number (35630794).

Almost surely, 2^71261587 is an apocalyptic number.

71261587 is a deficient number, since it is larger than the sum of its proper divisors (1).

71261587 is an equidigital number, since it uses as much as digits as its factorization.

71261587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 37.

The square root of 71261587 is about 8441.6578348095. The cubic root of 71261587 is about 414.5896888117.

The spelling of 71261587 in words is "seventy-one million, two hundred sixty-one thousand, five hundred eighty-seven".