134981521 has 2 divisors, whose sum is σ = 134981522. Its totient is φ = 134981520.

The previous prime is 134981519. The next prime is 134981527. The reversal of 134981521 is 125189431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133633600 + 1347921 = 11560^2 + 1161^2 .

It is a cyclic number.

It is not a de Polignac number, because 134981521 - 2¹ = 134981519 is a prime.

It is a super-2 number, since 2×134981521² = 36440022022946882, which contains 22 as substring.

Together with 134981519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (134981527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67490760 + 67490761.

It is an arithmetic number, because the mean of its divisors is an integer number (67490761).

Almost surely, 2^134981521 is an apocalyptic number.

It is an amenable number.

134981521 is a deficient number, since it is larger than the sum of its proper divisors (1).

134981521 is an equidigital number, since it uses as much as digits as its factorization.

134981521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 34.

The square root of 134981521 is about 11618.1548018607. The cubic root of 134981521 is about 512.9693765309.

The spelling of 134981521 in words is "one hundred thirty-four million, nine hundred eighty-one thousand, five hundred twenty-one".