1225379085 has 16 divisors (see below), whose sum is σ = 2240693376. Its totient is φ = 560173248.

The previous prime is 1225379081. The next prime is 1225379093. The reversal of 1225379085 is 5809735221.

It is a happy number.

It is not a de Polignac number, because 1225379085 - 2² = 1225379081 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225379081) by changing a digit.

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, 5835034 + ... + 5835243.

It is an arithmetic number, because the mean of its divisors is an integer number (140043336).

Almost surely, 2^1225379085 is an apocalyptic number.

1225379085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225379085 is a deficient number, since it is larger than the sum of its proper divisors (1015314291).

1225379085 is a wasteful number, since it uses less digits than its factorization.

1225379085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11670292.

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

The square root of 1225379085 is about 35005.4150810985. The cubic root of 1225379085 is about 1070.0978409381.

The spelling of 1225379085 in words is "one billion, two hundred twenty-five million, three hundred seventy-nine thousand, eighty-five".