1298623 has 4 divisors (see below), whose sum is σ = 1308240. Its totient is φ = 1289008.
The previous prime is 1298617. The next prime is 1298641. The reversal of 1298623 is 3268921.
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 1298623 - 29 = 1298111 is a prime.
It is a super-2 number, since 2×12986232 = 3372843392258, which contains 22 as substring.
It is an Ulam number.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1298653) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4603 + ... + 4876.
It is an arithmetic number, because the mean of its divisors is an integer number (327060).
21298623 is an apocalyptic number.
1298623 is a deficient number, since it is larger than the sum of its proper divisors (9617).
1298623 is an equidigital number, since it uses as much as digits as its factorization.
1298623 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 9616.
The product of its digits is 5184, while the sum is 31.
The square root of 1298623 is about 1139.5714106628. The cubic root of 1298623 is about 109.1007401283.
The spelling of 1298623 in words is "one million, two hundred ninety-eight thousand, six hundred twenty-three".
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