134242991 has 4 divisors (see below), whose sum is σ = 134563800. Its totient is φ = 133922184.

The previous prime is 134242981. The next prime is 134243023. The reversal of 134242991 is 199242431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 134242991 - 2²² = 130048687 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 (134242921) 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, 159776 + ... + 160613.

It is an arithmetic number, because the mean of its divisors is an integer number (33640950).

Almost surely, 2^134242991 is an apocalyptic number.

134242991 is a deficient number, since it is larger than the sum of its proper divisors (320809).

134242991 is an equidigital number, since it uses as much as digits as its factorization.

134242991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320808.

The product of its digits is 15552, while the sum is 35.

The square root of 134242991 is about 11586.3277616335. The cubic root of 134242991 is about 512.0321215504.

The spelling of 134242991 in words is "one hundred thirty-four million, two hundred forty-two thousand, nine hundred ninety-one".