1225022636 has 12 divisors (see below), whose sum is σ = 2173157112. Its totient is φ = 604120608.

The previous prime is 1225022609. The next prime is 1225022651. The reversal of 1225022636 is 6362205221.

It is a junction number, because it is equal to n+sod(n) for n = 1225022599 and 1225022608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2097350 + ... + 2097933.

It is an arithmetic number, because the mean of its divisors is an integer number (181096426).

Almost surely, 2^1225022636 is an apocalyptic number.

It is an amenable number.

1225022636 is a deficient number, since it is larger than the sum of its proper divisors (948134476).

1225022636 is a wasteful number, since it uses less digits than its factorization.

1225022636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195360 (or 4195358 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1225022636 is about 35000.3233699347. The cubic root of 1225022636 is about 1069.9940710651.

Adding to 1225022636 its reverse (6362205221), we get a palindrome (7587227857).

The spelling of 1225022636 in words is "one billion, two hundred twenty-five million, twenty-two thousand, six hundred thirty-six".