1243875 has 32 divisors (see below), whose sum is σ = 2156544. Its totient is φ = 636000.

The previous prime is 1243859. The next prime is 1243877. The reversal of 1243875 is 5783421.

1243875 = 31² + 32² + ... + 155².

It is not a de Polignac number, because 1243875 - 2⁴ = 1243859 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

1243875 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1243877) 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 31 ways as a sum of consecutive naturals, for example, 11572 + ... + 11678.

It is an arithmetic number, because the mean of its divisors is an integer number (67392).

2^1243875 is an apocalyptic number.

1243875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1243875 is a deficient number, since it is larger than the sum of its proper divisors (912669).

1243875 is a wasteful number, since it uses less digits than its factorization.

1243875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 146 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 1243875 is about 1115.2914417317. The cubic root of 1243875 is about 107.5455008394.

The spelling of 1243875 in words is "one million, two hundred forty-three thousand, eight hundred seventy-five".