1225287 has 20 divisors (see below), whose sum is σ = 2092816. Its totient is φ = 699840.

The previous prime is 1225283. The next prime is 1225297. The reversal of 1225287 is 7825221.

It is not a de Polignac number, because 1225287 - 2² = 1225283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 1225287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225283) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 514 + ... + 1647.

2^1225287 is an apocalyptic number.

1225287 is a deficient number, since it is larger than the sum of its proper divisors (867529).

1225287 is an equidigital number, since it uses as much as digits as its factorization.

1225287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180 (or 2171 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 1225287 is about 1106.9268268499. The cubic root of 1225287 is about 107.0071034967.

The spelling of 1225287 in words is "one million, two hundred twenty-five thousand, two hundred eighty-seven".