1225612069 has 4 divisors (see below), whose sum is σ = 1337031360. Its totient is φ = 1114192780.

The previous prime is 1225612051. The next prime is 1225612097. The reversal of 1225612069 is 9602165221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9602165221 = 11 ⋅872924111.

It is a cyclic number.

It is not a de Polignac number, because 1225612069 - 2¹³ = 1225603877 is a prime.

It is a super-2 number, since 2×1225612069² = 3004249887356921522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225612019) 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, 55709629 + ... + 55709650.

It is an arithmetic number, because the mean of its divisors is an integer number (334257840).

Almost surely, 2^1225612069 is an apocalyptic number.

It is an amenable number.

1225612069 is a deficient number, since it is larger than the sum of its proper divisors (111419291).

1225612069 is a wasteful number, since it uses less digits than its factorization.

1225612069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111419290.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1225612069 is about 35008.7427509187. The cubic root of 1225612069 is about 1070.1656566530.

The spelling of 1225612069 in words is "one billion, two hundred twenty-five million, six hundred twelve thousand, sixty-nine".