1230001305 has 32 divisors (see below), whose sum is σ = 2121659904. Its totient is φ = 604889856.

The previous prime is 1230001303. The next prime is 1230001307. The reversal of 1230001305 is 5031000321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1230001303) and next prime (1230001307).

It is not a de Polignac number, because 1230001305 - 2¹ = 1230001303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1230001303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214992 + ... + 220638.

It is an arithmetic number, because the mean of its divisors is an integer number (66301872).

Almost surely, 2^1230001305 is an apocalyptic number.

1230001305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1230001305 is a deficient number, since it is larger than the sum of its proper divisors (891658599).

1230001305 is a wasteful number, since it uses less digits than its factorization.

1230001305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6785.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1230001305 is about 35071.3744384220. The cubic root of 1230001305 is about 1071.4416486150.

Adding to 1230001305 its reverse (5031000321), we get a palindrome (6261001626).

The spelling of 1230001305 in words is "one billion, two hundred thirty million, one thousand, three hundred five".