1249830 has 40 divisors (see below), whose sum is σ = 3362832. Its totient is φ = 333072.

The previous prime is 1249819. The next prime is 1249837. The reversal of 1249830 is 389421.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1249794 and 1249803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249837) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39 + ... + 1581.

2^1249830 is an apocalyptic number.

1249830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1249830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1681416).

1249830 is an abundant number, since it is smaller than the sum of its proper divisors (2113002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1249830 is a wasteful number, since it uses less digits than its factorization.

1249830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562 (or 1553 counting only the distinct ones).

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

The square root of 1249830 is about 1117.9579598536. The cubic root of 1249830 is about 107.7168508949.

The spelling of 1249830 in words is "one million, two hundred forty-nine thousand, eight hundred thirty".