612740 has 12 divisors (see below), whose sum is σ = 1286796. Its totient is φ = 245088.

The previous prime is 612737. The next prime is 612751. The reversal of 612740 is 47216.

612740 = 3² + 4² + ... + 122².

It can be written as a sum of positive squares in 2 ways, for example, as 432964 + 179776 = 658^2 + 424^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 30637 = 612740 / (6 + 1 + 2 + 7 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15299 + ... + 15338.

It is an arithmetic number, because the mean of its divisors is an integer number (107233).

2⁶¹²⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

612740 is an abundant number, since it is smaller than the sum of its proper divisors (674056).

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

612740 is a wasteful number, since it uses less digits than its factorization.

612740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30646 (or 30644 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 612740 is about 782.7771074833. Note that the first 3 decimals coincide. The cubic root of 612740 is about 84.9360534036.

Adding to 612740 its reverse (47216), we get a palindrome (659956).

The spelling of 612740 in words is "six hundred twelve thousand, seven hundred forty".