1225291 has 4 divisors (see below), whose sum is σ = 1289800. Its totient is φ = 1160784.

The previous prime is 1225283. The next prime is 1225297. The reversal of 1225291 is 1925221.

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 1225291 - 2³ = 1225283 is a prime.

It is a Duffinian number.

1225291 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1225297) 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, 32226 + ... + 32263.

It is an arithmetic number, because the mean of its divisors is an integer number (322450).

2^1225291 is an apocalyptic number.

1225291 is a deficient number, since it is larger than the sum of its proper divisors (64509).

1225291 is an equidigital number, since it uses as much as digits as its factorization.

1225291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64508.

The product of its digits is 360, while the sum is 22.

The square root of 1225291 is about 1106.9286336526. The cubic root of 1225291 is about 107.0072199396.

The spelling of 1225291 in words is "one million, two hundred twenty-five thousand, two hundred ninety-one".