612475821 has 12 divisors (see below), whose sum is σ = 885661920. Its totient is φ = 407867400.

The previous prime is 612475793. The next prime is 612475867. The reversal of 612475821 is 128574216.

It is not a de Polignac number, because 612475821 - 2⁹ = 612475309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612475421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28755 + ... + 45296.

It is an arithmetic number, because the mean of its divisors is an integer number (73805160).

Almost surely, 2^612475821 is an apocalyptic number.

It is an amenable number.

612475821 is a deficient number, since it is larger than the sum of its proper divisors (273186099).

612475821 is a wasteful number, since it uses less digits than its factorization.

612475821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74976 (or 74973 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 612475821 is about 24748.2488471407. The cubic root of 612475821 is about 849.2384510042.

The spelling of 612475821 in words is "six hundred twelve million, four hundred seventy-five thousand, eight hundred twenty-one".