1225677789 has 24 divisors (see below), whose sum is σ = 2038800192. Its totient is φ = 695036160.

The previous prime is 1225677773. The next prime is 1225677793. The reversal of 1225677789 is 9877765221.

It is a happy number.

1225677789 is a `hidden beast` number, since 1 + 2 + 2 + 567 + 7 + 78 + 9 = 666.

It is not a de Polignac number, because 1225677789 - 2⁴ = 1225677773 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225677709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66004 + ... + 82509.

It is an arithmetic number, because the mean of its divisors is an integer number (84950008).

Almost surely, 2^1225677789 is an apocalyptic number.

It is an amenable number.

1225677789 is a deficient number, since it is larger than the sum of its proper divisors (813122403).

1225677789 is a wasteful number, since it uses less digits than its factorization.

1225677789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148657 (or 148654 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The square root of 1225677789 is about 35009.6813610178. The cubic root of 1225677789 is about 1070.1847845189.

The spelling of 1225677789 in words is "one billion, two hundred twenty-five million, six hundred seventy-seven thousand, seven hundred eighty-nine".