1225405959 has 16 divisors (see below), whose sum is σ = 1694787072. Its totient is φ = 787002048.

The previous prime is 1225405957. The next prime is 1225405999. The reversal of 1225405959 is 9595045221.

It is a happy number.

It is not a de Polignac number, because 1225405959 - 2¹ = 1225405957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1225405959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225405957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55647 + ... + 74480.

It is an arithmetic number, because the mean of its divisors is an integer number (105924192).

Almost surely, 2^1225405959 is an apocalyptic number.

1225405959 is a deficient number, since it is larger than the sum of its proper divisors (469381113).

1225405959 is a wasteful number, since it uses less digits than its factorization.

1225405959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130246.

The product of its (nonzero) digits is 162000, while the sum is 42.

The square root of 1225405959 is about 35005.7989338909. The cubic root of 1225405959 is about 1070.1056637144.

The spelling of 1225405959 in words is "one billion, two hundred twenty-five million, four hundred five thousand, nine hundred fifty-nine".