612044421 has 16 divisors (see below), whose sum is σ = 901632384. Its totient is φ = 367330304.

The previous prime is 612044401. The next prime is 612044429. The reversal of 612044421 is 124440216.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 612044421 - 2¹¹ = 612042373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 612044391 and 612044400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612044429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259716 + ... + 262061.

It is an arithmetic number, because the mean of its divisors is an integer number (56352024).

Almost surely, 2^612044421 is an apocalyptic number.

It is an amenable number.

612044421 is a deficient number, since it is larger than the sum of its proper divisors (289587963).

612044421 is a wasteful number, since it uses less digits than its factorization.

612044421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521820.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 612044421 is about 24739.5315436651. The cubic root of 612044421 is about 849.0390159109.

Adding to 612044421 its reverse (124440216), we get a palindrome (736484637).

The spelling of 612044421 in words is "six hundred twelve million, forty-four thousand, four hundred twenty-one".