135121761 has 12 divisors (see below), whose sum is σ = 196581840. Its totient is φ = 89432280.

The previous prime is 135121747. The next prime is 135121769. The reversal of 135121761 is 167121531.

It is not a de Polignac number, because 135121761 - 2⁹ = 135121249 is a prime.

It is a super-2 number, since 2×135121761² = 36515780591482242, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (135121769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52755 + ... + 55256.

It is an arithmetic number, because the mean of its divisors is an integer number (16381820).

Almost surely, 2^135121761 is an apocalyptic number.

It is an amenable number.

135121761 is a deficient number, since it is larger than the sum of its proper divisors (61460079).

135121761 is a wasteful number, since it uses less digits than its factorization.

135121761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108156 (or 108153 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 135121761 is about 11624.1886168455. The cubic root of 135121761 is about 513.1469660889.

The spelling of 135121761 in words is "one hundred thirty-five million, one hundred twenty-one thousand, seven hundred sixty-one".