612305421 has 60 divisors (see below), whose sum is σ = 1033367328. Its totient is φ = 322332192.

The previous prime is 612305417. The next prime is 612305461. The reversal of 612305421 is 124503216.

It is not a de Polignac number, because 612305421 - 2² = 612305417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 612305391 and 612305400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612305401) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1217056 + ... + 1217558.

Almost surely, 2^612305421 is an apocalyptic number.

It is an amenable number.

612305421 is a deficient number, since it is larger than the sum of its proper divisors (421061907).

612305421 is an equidigital number, since it uses as much as digits as its factorization.

612305421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 612305421 is about 24744.8059398331. The cubic root of 612305421 is about 849.1596867225.

Adding to 612305421 its reverse (124503216), we get a palindrome (736808637).

The spelling of 612305421 in words is "six hundred twelve million, three hundred five thousand, four hundred twenty-one".