1009251 has 6 divisors (see below), whose sum is σ = 1457820. Its totient is φ = 672828.

The previous prime is 1009247. The next prime is 1009259. The reversal of 1009251 is 1529001.

It is not a de Polignac number, because 1009251 - 2² = 1009247 is a prime.

It is an Ulam number.

1009251 is a lucky number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1009259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56061 + ... + 56078.

It is an arithmetic number, because the mean of its divisors is an integer number (242970).

2^1009251 is an apocalyptic number.

1009251 is a deficient number, since it is larger than the sum of its proper divisors (448569).

1009251 is a wasteful number, since it uses less digits than its factorization.

1009251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112145 (or 112142 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 1009251 is about 1004.6148515725. The cubic root of 1009251 is about 100.3074206238.

The spelling of 1009251 in words is "one million, nine thousand, two hundred fifty-one".