1225751 has 4 divisors (see below), whose sum is σ = 1297872. Its totient is φ = 1153632.

The previous prime is 1225729. The next prime is 1225759. The reversal of 1225751 is 1575221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1575221 = 601 ⋅2621.

It is a cyclic number.

It is not a de Polignac number, because 1225751 - 2⁶ = 1225687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225759) 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, 36035 + ... + 36068.

It is an arithmetic number, because the mean of its divisors is an integer number (324468).

2^1225751 is an apocalyptic number.

1225751 is a deficient number, since it is larger than the sum of its proper divisors (72121).

1225751 is an equidigital number, since it uses as much as digits as its factorization.

1225751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72120.

The product of its digits is 700, while the sum is 23.

The square root of 1225751 is about 1107.1363962945. The cubic root of 1225751 is about 107.0206091842.

The spelling of 1225751 in words is "one million, two hundred twenty-five thousand, seven hundred fifty-one".