1249803 has 16 divisors (see below), whose sum is σ = 1898400. Its totient is φ = 812160.

The previous prime is 1249799. The next prime is 1249811. The reversal of 1249803 is 3089421.

It is not a de Polignac number, because 1249803 - 2² = 1249799 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1249873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543 + ... + 1671.

It is an arithmetic number, because the mean of its divisors is an integer number (118650).

2^1249803 is an apocalyptic number.

1249803 is a deficient number, since it is larger than the sum of its proper divisors (648597).

1249803 is a wasteful number, since it uses less digits than its factorization.

1249803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1173 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1249803 is about 1117.9458842001. The cubic root of 1249803 is about 107.7160752225.

The spelling of 1249803 in words is "one million, two hundred forty-nine thousand, eight hundred three".