621234 has 12 divisors (see below), whose sum is σ = 1346046. Its totient is φ = 207072.

The previous prime is 621227. The next prime is 621239. The reversal of 621234 is 432126.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 416025 + 205209 = 645^2 + 453^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 34513 = 621234 / (6 + 2 + 1 + 2 + 3 + 4).

It is an Ulam number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621239) 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 5 ways as a sum of consecutive naturals, for example, 17239 + ... + 17274.

2⁶²¹²³⁴ is an apocalyptic number.

621234 is an abundant number, since it is smaller than the sum of its proper divisors (724812).

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

621234 is a wasteful number, since it uses less digits than its factorization.

621234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34521 (or 34518 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 621234 is about 788.1839886727. The cubic root of 621234 is about 85.3267240704.

It can be divided in two parts, 62 and 1234, that added together give a 4-th power (1296 = 6⁴).

The spelling of 621234 in words is "six hundred twenty-one thousand, two hundred thirty-four".