1225850761 has 4 divisors (see below), whose sum is σ = 1226230852. Its totient is φ = 1225470672.

The previous prime is 1225850741. The next prime is 1225850771. The reversal of 1225850761 is 1670585221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1670585221 = 41 ⋅40745981.

It can be written as a sum of positive squares in 2 ways, for example, as 1112556025 + 113294736 = 33355^2 + 10644^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225850761 is a prime.

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 1225850761.

It is not an unprimeable number, because it can be changed into a prime (1225850741) 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, 185166 + ... + 191671.

It is an arithmetic number, because the mean of its divisors is an integer number (306557713).

Almost surely, 2^1225850761 is an apocalyptic number.

It is an amenable number.

1225850761 is a deficient number, since it is larger than the sum of its proper divisors (380091).

1225850761 is an equidigital number, since it uses as much as digits as its factorization.

1225850761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380090.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 1225850761 is about 35012.1516191165. The cubic root of 1225850761 is about 1070.2351249094.

The spelling of 1225850761 in words is "one billion, two hundred twenty-five million, eight hundred fifty thousand, seven hundred sixty-one".