1225267515 has 24 divisors (see below), whose sum is σ = 2163872880. Its totient is φ = 641145024.

The previous prime is 1225267513. The next prime is 1225267531. The reversal of 1225267515 is 5157625221.

1225267515 is a `hidden beast` number, since 122 + 526 + 7 + 5 + 1 + 5 = 666.

It is not a de Polignac number, because 1225267515 - 2¹ = 1225267513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1225267515.

It is not an unprimeable number, because it can be changed into a prime (1225267513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254485 + ... + 259254.

It is an arithmetic number, because the mean of its divisors is an integer number (90161370).

Almost surely, 2^1225267515 is an apocalyptic number.

1225267515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1225267515 is a deficient number, since it is larger than the sum of its proper divisors (938605365).

1225267515 is a wasteful number, since it uses less digits than its factorization.

1225267515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513803 (or 513800 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 1225267515 is about 35003.8214342377. The cubic root of 1225267515 is about 1070.0653627058.

The spelling of 1225267515 in words is "one billion, two hundred twenty-five million, two hundred sixty-seven thousand, five hundred fifteen".