134887561 has 2 divisors, whose sum is σ = 134887562. Its totient is φ = 134887560.

The previous prime is 134887483. The next prime is 134887583. The reversal of 134887561 is 165788431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73359225 + 61528336 = 8565^2 + 7844^2 .

It is a cyclic number.

It is not a de Polignac number, because 134887561 - 2²¹ = 132790409 is a prime.

It is a super-2 number, since 2×134887561² = 36389308225057442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (134887591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67443780 + 67443781.

It is an arithmetic number, because the mean of its divisors is an integer number (67443781).

Almost surely, 2^134887561 is an apocalyptic number.

It is an amenable number.

134887561 is a deficient number, since it is larger than the sum of its proper divisors (1).

134887561 is an equidigital number, since it uses as much as digits as its factorization.

134887561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 134887561 is about 11614.1104265458. The cubic root of 134887561 is about 512.8503237149.

The spelling of 134887561 in words is "one hundred thirty-four million, eight hundred eighty-seven thousand, five hundred sixty-one".