1145021225 has 12 divisors (see below), whose sum is σ = 1494554640. Its totient is φ = 867805200.

The previous prime is 1145021221. The next prime is 1145021237. The reversal of 1145021225 is 5221205411.

It is not a de Polignac number, because 1145021225 - 2² = 1145021221 is a prime.

It is a super-2 number, since 2×1145021225² = 2622147211401001250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1145021225.

It is not an unprimeable number, because it can be changed into a prime (1145021221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1204811 + ... + 1205760.

It is an arithmetic number, because the mean of its divisors is an integer number (124546220).

Almost surely, 2^1145021225 is an apocalyptic number.

It is an amenable number.

1145021225 is a deficient number, since it is larger than the sum of its proper divisors (349533415).

1145021225 is a wasteful number, since it uses less digits than its factorization.

1145021225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410600 (or 2410595 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1145021225 is about 33838.1622580187. The cubic root of 1145021225 is about 1046.1754208970.

Adding to 1145021225 its reverse (5221205411), we get a palindrome (6366226636).

The spelling of 1145021225 in words is "one billion, one hundred forty-five million, twenty-one thousand, two hundred twenty-five".