612545 has 4 divisors (see below), whose sum is σ = 735060. Its totient is φ = 490032.

The previous prime is 612511. The next prime is 612553. The reversal of 612545 is 545216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 485809 + 126736 = 697^2 + 356^2 .

It is a cyclic number.

It is not a de Polignac number, because 612545 - 2⁶ = 612481 is a prime.

It is a super-2 number, since 2×612545² = 750422754050, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 612545.

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, 61250 + ... + 61259.

It is an arithmetic number, because the mean of its divisors is an integer number (183765).

2⁶¹²⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

612545 is a deficient number, since it is larger than the sum of its proper divisors (122515).

612545 is a wasteful number, since it uses less digits than its factorization.

612545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122514.

The product of its digits is 1200, while the sum is 23.

The square root of 612545 is about 782.6525410423. The cubic root of 612545 is about 84.9270423562.

It can be divided in two parts, 6125 and 45, that multiplied together give a square (275625 = 525²).

The spelling of 612545 in words is "six hundred twelve thousand, five hundred forty-five".