1290850225 has 36 divisors (see below), whose sum is σ = 1851405312. Its totient is φ = 874540800.

The previous prime is 1290850181. The next prime is 1290850271. The reversal of 1290850225 is 5220580921.

It is a happy number.

It is not a de Polignac number, because 1290850225 - 2¹¹ = 1290848177 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 5356105 + ... + 5356345.

Almost surely, 2^1290850225 is an apocalyptic number.

It is an amenable number.

1290850225 is a deficient number, since it is larger than the sum of its proper divisors (560555087).

1290850225 is an equidigital number, since it uses as much as digits as its factorization.

1290850225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 1290850225 is about 35928.4041532601. The cubic root of 1290850225 is about 1088.8263396070.

The spelling of 1290850225 in words is "one billion, two hundred ninety million, eight hundred fifty thousand, two hundred twenty-five".