1225604669 has 4 divisors (see below), whose sum is σ = 1243897344. Its totient is φ = 1207311996.

The previous prime is 1225604621. The next prime is 1225604689. The reversal of 1225604669 is 9664065221.

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.

It is a cyclic number.

It is not a de Polignac number, because 1225604669 - 2¹² = 1225600573 is a prime.

It is a super-2 number, since 2×1225604669² = 3004213609349199122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225604609) 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, 9146237 + ... + 9146370.

It is an arithmetic number, because the mean of its divisors is an integer number (310974336).

Almost surely, 2^1225604669 is an apocalyptic number.

It is an amenable number.

1225604669 is a deficient number, since it is larger than the sum of its proper divisors (18292675).

1225604669 is an equidigital number, since it uses as much as digits as its factorization.

1225604669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18292674.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 1225604669 is about 35008.6370628735. The cubic root of 1225604669 is about 1070.1635028335.

The spelling of 1225604669 in words is "one billion, two hundred twenty-five million, six hundred four thousand, six hundred sixty-nine".