1245830 has 32 divisors (see below), whose sum is σ = 2419200. Its totient is φ = 460512.

The previous prime is 1245817. The next prime is 1245833. The reversal of 1245830 is 385421.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1245796 and 1245805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14969 + ... + 15051.

It is an arithmetic number, because the mean of its divisors is an integer number (75600).

2^1245830 is an apocalyptic number.

1245830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1245830 is a deficient number, since it is larger than the sum of its proper divisors (1173370).

1245830 is a wasteful number, since it uses less digits than its factorization.

1245830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1245830 is about 1116.1675501465. The cubic root of 1245830 is about 107.6018144827.

The spelling of 1245830 in words is "one million, two hundred forty-five thousand, eight hundred thirty".