34145781 has 8 divisors (see below), whose sum is σ = 45829824. Its totient is φ = 22612800.

The previous prime is 34145779. The next prime is 34145801. The reversal of 34145781 is 18754143.

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

It is not a de Polignac number, because 34145781 - 2¹ = 34145779 is a prime.

It is a super-2 number, since 2×34145781² = 2331868720199922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34145701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37236 + ... + 38141.

It is an arithmetic number, because the mean of its divisors is an integer number (5728728).

Almost surely, 2^34145781 is an apocalyptic number.

It is an amenable number.

34145781 is a deficient number, since it is larger than the sum of its proper divisors (11684043).

34145781 is a wasteful number, since it uses less digits than its factorization.

34145781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75531.

The product of its digits is 13440, while the sum is 33.

The square root of 34145781 is about 5843.4391414646. The cubic root of 34145781 is about 324.4235335252.

The spelling of 34145781 in words is "thirty-four million, one hundred forty-five thousand, seven hundred eighty-one".