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290012225 = 5211600489

290012225 has 6 divisors (see below), whose sum is σ = 359615190. Its totient is φ = 232009760.

The previous prime is 290012189. The next prime is 290012227. The reversal of 290012225 is 522210092.

It can be written as a sum of positive squares in 3 ways, for example, as 54051904 + 235960321 = 7352^2 + 15361^2 .

It is a de Polignac number, because none of the positive numbers 2k-290012225 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 290012225.

It is not an unprimeable number, because it can be changed into a prime (290012227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5800220 + ... + 5800269.

It is an arithmetic number, because the mean of its divisors is an integer number (59935865).

Almost surely, 2290012225 is an apocalyptic number.

290012225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

290012225 is a deficient number, since it is larger than the sum of its proper divisors (69602965).

290012225 is a wasteful number, since it uses less digits than its factorization.

290012225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11600499 (or 11600494 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 290012225 is about 17029.7453005029. The cubic root of 290012225 is about 661.9198956570.

The spelling of 290012225 in words is "two hundred ninety million, twelve thousand, two hundred twenty-five".

Divisors: 1 5 25 11600489 58002445 290012225