135278725 has 6 divisors (see below), whose sum is σ = 167745650. Its totient is φ = 108222960.

The previous prime is 135278723. The next prime is 135278729. The reversal of 135278725 is 527872531.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 38118276 + 97160449 = 6174^2 + 9857^2 .

It is not a de Polignac number, because 135278725 - 2¹ = 135278723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135278723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2705550 + ... + 2705599.

Almost surely, 2^135278725 is an apocalyptic number.

It is an amenable number.

135278725 is a deficient number, since it is larger than the sum of its proper divisors (32466925).

135278725 is an equidigital number, since it uses as much as digits as its factorization.

135278725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5411159 (or 5411154 counting only the distinct ones).

The product of its digits is 117600, while the sum is 40.

The square root of 135278725 is about 11630.9382682568. The cubic root of 135278725 is about 513.3455880116.

The spelling of 135278725 in words is "one hundred thirty-five million, two hundred seventy-eight thousand, seven hundred twenty-five".