624142 has 4 divisors (see below), whose sum is σ = 936216. Its totient is φ = 312070.

The previous prime is 624139. The next prime is 624149. The reversal of 624142 is 241426.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241426 = 2 ⋅120713.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (624149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156034 + ... + 156037.

It is an arithmetic number, because the mean of its divisors is an integer number (234054).

2⁶²⁴¹⁴² is an apocalyptic number.

624142 is a deficient number, since it is larger than the sum of its proper divisors (312074).

624142 is a wasteful number, since it uses less digits than its factorization.

624142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312073.

The product of its digits is 384, while the sum is 19.

The square root of 624142 is about 790.0265818313. The cubic root of 624142 is about 85.4596551673.

Adding to 624142 its reverse (241426), we get a palindrome (865568).

The spelling of 624142 in words is "six hundred twenty-four thousand, one hundred forty-two".