135067621 has 4 divisors (see below), whose sum is σ = 145457452. Its totient is φ = 124677792.

The previous prime is 135067619. The next prime is 135067633. The reversal of 135067621 is 126760531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126760531 = 761 ⋅166571.

It can be written as a sum of positive squares in 2 ways, for example, as 46444225 + 88623396 = 6815^2 + 9414^2 .

It is a cyclic number.

It is not a de Polignac number, because 135067621 - 2¹ = 135067619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135067921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5194896 + ... + 5194921.

It is an arithmetic number, because the mean of its divisors is an integer number (36364363).

Almost surely, 2^135067621 is an apocalyptic number.

It is an amenable number.

135067621 is a deficient number, since it is larger than the sum of its proper divisors (10389831).

135067621 is a wasteful number, since it uses less digits than its factorization.

135067621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10389830.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 135067621 is about 11621.8596188390. The cubic root of 135067621 is about 513.0784217679.

The spelling of 135067621 in words is "one hundred thirty-five million, sixty-seven thousand, six hundred twenty-one".