134871781 has 8 divisors (see below), whose sum is σ = 147573504. Its totient is φ = 122243520.

The previous prime is 134871773. The next prime is 134871787. The reversal of 134871781 is 187178431.

134871781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 134871781 - 2³ = 134871773 is a prime.

It is a super-2 number, since 2×134871781² = 36380794620223922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134871787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14485 + ... + 21898.

It is an arithmetic number, because the mean of its divisors is an integer number (18446688).

Almost surely, 2^134871781 is an apocalyptic number.

134871781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

134871781 is a deficient number, since it is larger than the sum of its proper divisors (12701723).

134871781 is a wasteful number, since it uses less digits than its factorization.

134871781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36731.

The product of its digits is 37632, while the sum is 40.

The square root of 134871781 is about 11613.4310606298. The cubic root of 134871781 is about 512.8303241101.

The spelling of 134871781 in words is "one hundred thirty-four million, eight hundred seventy-one thousand, seven hundred eighty-one".