1002251 has 4 divisors (see below), whose sum is σ = 1005312. Its totient is φ = 999192.

The previous prime is 1002247. The next prime is 1002257. The reversal of 1002251 is 1522001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1002251 - 2² = 1002247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 971 + ... + 1716.

It is an arithmetic number, because the mean of its divisors is an integer number (251328).

2^1002251 is an apocalyptic number.

1002251 is a deficient number, since it is larger than the sum of its proper divisors (3061).

1002251 is an equidigital number, since it uses as much as digits as its factorization.

1002251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1002251 is about 1001.1248673367. The cubic root of 1002251 is about 100.0749771036.

Adding to 1002251 its reverse (1522001), we get a palindrome (2524252).

The spelling of 1002251 in words is "one million, two thousand, two hundred fifty-one".