1230100 has 18 divisors (see below), whose sum is σ = 2669534. Its totient is φ = 492000.
The previous prime is 1230071. The next prime is 1230107. The reversal of 1230100 is 10321.
It can be written as a sum of positive squares in 3 ways, for example, as 37636 + 1192464 = 194^2 + 1092^2 .
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1230107) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6051 + ... + 6250.
21230100 is an apocalyptic number.
1230100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
1230100 is an abundant number, since it is smaller than the sum of its proper divisors (1439434).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1230100 is a wasteful number, since it uses less digits than its factorization.
1230100 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 12315 (or 12308 counting only the distinct ones).
The product of its (nonzero) digits is 6, while the sum is 7.
The square root of 1230100 is about 1109.0987332064. The cubic root of 1230100 is about 107.1470305253.
Adding to 1230100 its reverse (10321), we get a palindrome (1240421).
The spelling of 1230100 in words is "one million, two hundred thirty thousand, one hundred".
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