4012345 has 8 divisors (see below), whose sum is σ = 4833864. Its totient is φ = 3197184.

The previous prime is 4012339. The next prime is 4012367. The reversal of 4012345 is 5432104.

It can be written as a sum of positive squares in 4 ways, for example, as 24336 + 3988009 = 156^2 + 1997^2 .

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 4012345 - 2¹¹ = 4010297 is a prime.

It is a Duffinian number.

4012345 is a lucky number.

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64 + ... + 2833.

It is an arithmetic number, because the mean of its divisors is an integer number (604233).

Almost surely, 2^4012345 is an apocalyptic number.

It is an amenable number.

4012345 is a deficient number, since it is larger than the sum of its proper divisors (821519).

4012345 is a wasteful number, since it uses less digits than its factorization.

4012345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3179.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 4012345 is about 2003.0838724327. The cubic root of 4012345 is about 158.9032413686.

Adding to 4012345 its reverse (5432104), we get a palindrome (9444449).

The spelling of 4012345 in words is "four million, twelve thousand, three hundred forty-five".