1225202085 has 16 divisors (see below), whose sum is σ = 2178137280. Its totient is φ = 653441040.

The previous prime is 1225202009. The next prime is 1225202101. The reversal of 1225202085 is 5802025221.

It is not a de Polignac number, because 1225202085 - 2¹⁴ = 1225185701 is a prime.

It is a super-2 number, since 2×1225202085² = 3002240298176694450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4537651 + ... + 4537920.

It is an arithmetic number, because the mean of its divisors is an integer number (136133580).

Almost surely, 2^1225202085 is an apocalyptic number.

1225202085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225202085 is a deficient number, since it is larger than the sum of its proper divisors (952935195).

1225202085 is an equidigital number, since it uses as much as digits as its factorization.

1225202085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9075585 (or 9075579 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 1225202085 is about 35002.8868095190. The cubic root of 1225202085 is about 1070.0463149953.

The spelling of 1225202085 in words is "one billion, two hundred twenty-five million, two hundred two thousand, eighty-five".