1225171926 has 64 divisors (see below), whose sum is σ = 2979037440. Its totient is φ = 370149120.

The previous prime is 1225171907. The next prime is 1225171933. The reversal of 1225171926 is 6291715221.

1225171926 is a `hidden beast` number, since 122 + 517 + 19 + 2 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206761 + ... + 212603.

It is an arithmetic number, because the mean of its divisors is an integer number (46547460).

Almost surely, 2^1225171926 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225171926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1489518720).

1225171926 is an abundant number, since it is smaller than the sum of its proper divisors (1753865514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225171926 is a wasteful number, since it uses less digits than its factorization.

1225171926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6218 (or 6212 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 1225171926 is about 35002.4559995438. The cubic root of 1225171926 is about 1070.0375350038.

The spelling of 1225171926 in words is "one billion, two hundred twenty-five million, one hundred seventy-one thousand, nine hundred twenty-six".