1249849 has 2 divisors, whose sum is σ = 1249850. Its totient is φ = 1249848.

The previous prime is 1249847. The next prime is 1249861. The reversal of 1249849 is 9489421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 714025 + 535824 = 845^2 + 732^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249849 - 2¹ = 1249847 is a prime.

Together with 1249847, it forms a pair of twin primes.

It is an Ulam number.

1249849 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1249841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624924 + 624925.

It is an arithmetic number, because the mean of its divisors is an integer number (624925).

2^1249849 is an apocalyptic number.

It is an amenable number.

1249849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249849 is an equidigital number, since it uses as much as digits as its factorization.

1249849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 1249849 is about 1117.9664574575. The cubic root of 1249849 is about 107.7173967317.

The spelling of 1249849 in words is "one million, two hundred forty-nine thousand, eight hundred forty-nine".