1201215225 has 24 divisors (see below), whose sum is σ = 2269725760. Its totient is φ = 549126720.

The previous prime is 1201215179. The next prime is 1201215251. The reversal of 1201215225 is 5225121021.

It is not a de Polignac number, because 1201215225 - 2⁸ = 1201214969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1143490 + ... + 1144539.

Almost surely, 2^1201215225 is an apocalyptic number.

1201215225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1201215225 is a deficient number, since it is larger than the sum of its proper divisors (1068510535).

1201215225 is a wasteful number, since it uses less digits than its factorization.

1201215225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288049 (or 2288044 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1201215225 is about 34658.5519749455. The cubic root of 1201215225 is about 1063.0171618457.

Adding to 1201215225 its reverse (5225121021), we get a palindrome (6426336246).

The spelling of 1201215225 in words is "one billion, two hundred one million, two hundred fifteen thousand, two hundred twenty-five".