134742409 has 4 divisors (see below), whose sum is σ = 136131604. Its totient is φ = 133353216.

The previous prime is 134742407. The next prime is 134742457. The reversal of 134742409 is 904247431.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 72726784 + 62015625 = 8528^2 + 7875^2 .

It is a cyclic number.

It is not a de Polignac number, because 134742409 - 2¹ = 134742407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134742401) 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, 694452 + ... + 694645.

It is an arithmetic number, because the mean of its divisors is an integer number (34032901).

Almost surely, 2^134742409 is an apocalyptic number.

It is an amenable number.

134742409 is a deficient number, since it is larger than the sum of its proper divisors (1389195).

134742409 is an equidigital number, since it uses as much as digits as its factorization.

134742409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389194.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 134742409 is about 11607.8597941223. The cubic root of 134742409 is about 512.6662989177. Note that the first 3 decimals are identical.

The spelling of 134742409 in words is "one hundred thirty-four million, seven hundred forty-two thousand, four hundred nine".