612138 has 8 divisors (see below), whose sum is σ = 1224288. Its totient is φ = 204044.

The previous prime is 612137. The next prime is 612149. The reversal of 612138 is 831216.

612138 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.

612138 is an admirable number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (612133) 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, 51006 + ... + 51017.

It is an arithmetic number, because the mean of its divisors is an integer number (153036).

2⁶¹²¹³⁸ is an apocalyptic number.

612138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

612138 is a wasteful number, since it uses less digits than its factorization.

612138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102028.

The product of its digits is 288, while the sum is 21.

The square root of 612138 is about 782.3924846265. The cubic root of 612138 is about 84.9082285196.

The spelling of 612138 in words is "six hundred twelve thousand, one hundred thirty-eight".