42499 has 2 divisors, whose sum is σ = 42500. Its totient is φ = 42498.
The previous prime is 42491. The next prime is 42509. The reversal of 42499 is 99424.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 42499 - 23 = 42491 is a prime.
42499 is a lucky number.
It is not a weakly prime, because it can be changed into another prime (42491) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21249 + 21250.
It is an arithmetic number, because the mean of its divisors is an integer number (21250).
242499 is an apocalyptic number.
42499 is a deficient number, since it is larger than the sum of its proper divisors (1).
42499 is an equidigital number, since it uses as much as digits as its factorization.
42499 is an evil number, because the sum of its binary digits is even.
The product of its digits is 2592, while the sum is 28.
The square root of 42499 is about 206.1528559104. The cubic root of 42499 is about 34.8973865253.
The spelling of 42499 in words is "forty-two thousand, four hundred ninety-nine".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.066 sec. • engine limits •