1225602061 has 4 divisors (see below), whose sum is σ = 1225784124. Its totient is φ = 1225420000.

The previous prime is 1225602017. The next prime is 1225602067. The reversal of 1225602061 is 1602065221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1602065221 = 199 ⋅8050579.

It can be written as a sum of positive squares in 2 ways, for example, as 188375625 + 1037226436 = 13725^2 + 32206^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225602061 - 2⁷ = 1225601933 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 (1225602067) 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, 80530 + ... + 94531.

It is an arithmetic number, because the mean of its divisors is an integer number (306446031).

Almost surely, 2^1225602061 is an apocalyptic number.

It is an amenable number.

1225602061 is a deficient number, since it is larger than the sum of its proper divisors (182063).

1225602061 is an equidigital number, since it uses as much as digits as its factorization.

1225602061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182062.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1225602061 is about 35008.5998149026. The cubic root of 1225602061 is about 1070.1627437555.

Adding to 1225602061 its reverse (1602065221), we get a palindrome (2827667282).

The spelling of 1225602061 in words is "one billion, two hundred twenty-five million, six hundred two thousand, sixty-one".