1249021 has 8 divisors (see below), whose sum is σ = 1320704. Its totient is φ = 1179360.

The previous prime is 1249019. The next prime is 1249033. The reversal of 1249021 is 1209421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1249021 - 2¹ = 1249019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1249021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249091) 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 7 ways as a sum of consecutive naturals, for example, 865 + ... + 1801.

It is an arithmetic number, because the mean of its divisors is an integer number (165088).

2^1249021 is an apocalyptic number.

It is an amenable number.

1249021 is a deficient number, since it is larger than the sum of its proper divisors (71683).

1249021 is an equidigital number, since it uses as much as digits as its factorization.

1249021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1249021 is about 1117.5960808807. The cubic root of 1249021 is about 107.6936046024.

The spelling of 1249021 in words is "one million, two hundred forty-nine thousand, twenty-one".