1225805397 has 8 divisors (see below), whose sum is σ = 1647277056. Its totient is φ = 810768672.

The previous prime is 1225805377. The next prime is 1225805407. The reversal of 1225805397 is 7935085221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1225805397 - 2¹⁵ = 1225772629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225805327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1608288 + ... + 1609049.

It is an arithmetic number, because the mean of its divisors is an integer number (205909632).

Almost surely, 2^1225805397 is an apocalyptic number.

It is an amenable number.

1225805397 is a deficient number, since it is larger than the sum of its proper divisors (421471659).

1225805397 is a wasteful number, since it uses less digits than its factorization.

1225805397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3217467.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 1225805397 is about 35011.5037809004. The cubic root of 1225805397 is about 1070.2219229910.

The spelling of 1225805397 in words is "one billion, two hundred twenty-five million, eight hundred five thousand, three hundred ninety-seven".