1225868646 has 16 divisors (see below), whose sum is σ = 2452799808. Its totient is φ = 408445800.

The previous prime is 1225868621. The next prime is 1225868653. The reversal of 1225868646 is 6468685221.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1225868595 and 1225868604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28860 + ... + 57311.

It is an arithmetic number, because the mean of its divisors is an integer number (153299988).

Almost surely, 2^1225868646 is an apocalyptic number.

1225868646 is an abundant number, since it is smaller than the sum of its proper divisors (1226931162).

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

1225868646 is a wasteful number, since it uses less digits than its factorization.

1225868646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88547.

The product of its digits is 1105920, while the sum is 48.

The square root of 1225868646 is about 35012.4070295088. The cubic root of 1225868646 is about 1070.2403297469.

The spelling of 1225868646 in words is "one billion, two hundred twenty-five million, eight hundred sixty-eight thousand, six hundred forty-six".