1223251 has 4 divisors (see below), whose sum is σ = 1231504. Its totient is φ = 1215000.

The previous prime is 1223237. The next prime is 1223263. The reversal of 1223251 is 1523221.

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

It is a 5-Lehmer number, since φ(1223251) divides (1223251-1)⁵.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3900 + ... + 4201.

It is an arithmetic number, because the mean of its divisors is an integer number (307876).

2^1223251 is an apocalyptic number.

1223251 is the 700-th centered pentagonal number.

1223251 is a deficient number, since it is larger than the sum of its proper divisors (8253).

1223251 is an equidigital number, since it uses as much as digits as its factorization.

1223251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8252.

The product of its digits is 120, while the sum is 16.

The square root of 1223251 is about 1106.0067811727. The cubic root of 1223251 is about 106.9478011327.

Adding to 1223251 its reverse (1523221), we get a palindrome (2746472).

The spelling of 1223251 in words is "one million, two hundred twenty-three thousand, two hundred fifty-one".