616451 has 4 divisors (see below), whose sum is σ = 672504. Its totient is φ = 560400.

The previous prime is 616439. The next prime is 616459. The reversal of 616451 is 154616.

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

It is a cyclic number.

It is not a de Polignac number, because 616451 - 2⁶ = 616387 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 616451.

It is not an unprimeable number, because it can be changed into a prime (616459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28010 + ... + 28031.

It is an arithmetic number, because the mean of its divisors is an integer number (168126).

2⁶¹⁶⁴⁵¹ is an apocalyptic number.

616451 is a deficient number, since it is larger than the sum of its proper divisors (56053).

616451 is a wasteful number, since it uses less digits than its factorization.

616451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56052.

The product of its digits is 720, while the sum is 23.

The square root of 616451 is about 785.1439358487. The cubic root of 616451 is about 85.1071773742.

The spelling of 616451 in words is "six hundred sixteen thousand, four hundred fifty-one".