616525 has 24 divisors (see below), whose sum is σ = 944384. Its totient is φ = 388800.

The previous prime is 616523. The next prime is 616529. The reversal of 616525 is 525616.

It is not a de Polignac number, because 616525 - 2¹ = 616523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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

616525 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 616525.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 616525.

It is not an unprimeable number, because it can be changed into a prime (616523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2140 + ... + 2410.

2⁶¹⁶⁵²⁵ is an apocalyptic number.

616525 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

616525 is a deficient number, since it is larger than the sum of its proper divisors (327859).

616525 is a wasteful number, since it uses less digits than its factorization.

616525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 296 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 616525 is about 785.1910595518. The cubic root of 616525 is about 85.1105827161.

Subtracting from 616525 its reverse (525616), we obtain a palindrome (90909).

The spelling of 616525 in words is "six hundred sixteen thousand, five hundred twenty-five".