612129 has 16 divisors (see below), whose sum is σ = 945152. Its totient is φ = 345168.

The previous prime is 612113. The next prime is 612133. The reversal of 612129 is 921216.

612129 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 612129 - 2⁴ = 612113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

612129 is strictly pandigital in base 7.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (612109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2022 + ... + 2304.

It is an arithmetic number, because the mean of its divisors is an integer number (59072).

2⁶¹²¹²⁹ is an apocalyptic number.

It is an amenable number.

612129 is a deficient number, since it is larger than the sum of its proper divisors (333023).

612129 is a wasteful number, since it uses less digits than its factorization.

612129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its digits is 216, while the sum is 21.

The square root of 612129 is about 782.3867330164. The cubic root of 612129 is about 84.9078123946.

It can be divided in two parts, 612 and 129, that added together give a triangular number (741 = T₃₈).

The spelling of 612129 in words is "six hundred twelve thousand, one hundred twenty-nine".