1225761 has 8 divisors (see below), whose sum is σ = 1639680. Its totient is φ = 814512.

The previous prime is 1225759. The next prime is 1225769. The reversal of 1225761 is 1675221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1225761 - 2¹ = 1225759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1225769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011 + ... + 1863.

It is an arithmetic number, because the mean of its divisors is an integer number (204960).

2^1225761 is an apocalyptic number.

It is an amenable number.

1225761 is a deficient number, since it is larger than the sum of its proper divisors (413919).

1225761 is an equidigital number, since it uses as much as digits as its factorization.

1225761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335.

The product of its digits is 840, while the sum is 24.

The square root of 1225761 is about 1107.1409124407. The cubic root of 1225761 is about 107.0209002175.

The spelling of 1225761 in words is "one million, two hundred twenty-five thousand, seven hundred sixty-one".