1201662225 has 27 divisors (see below), whose sum is σ = 2153242299. Its totient is φ = 640609200.

The previous prime is 1201662223. The next prime is 1201662233. The reversal of 1201662225 is 5222661021.

The square root of 1201662225 is 34665.

It is a perfect power (a square), and thus also a powerful number.

1201662225 is a `hidden beast` number, since 1 + 2 + 0 + 16 + 622 + 25 = 666.

It can be written as a sum of positive squares in only one way, i.e., 432598401 + 769063824 = 20799^2 + 27732^2 .

It is not a de Polignac number, because 1201662225 - 2¹ = 1201662223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201662223) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 518820 + ... + 521130.

Almost surely, 2^1201662225 is an apocalyptic number.

1201662225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1201662225 is the 34665-th square number.

1201662225 is the 17333-rd centered octagonal number.

It is an amenable number.

1201662225 is a deficient number, since it is larger than the sum of its proper divisors (951580074).

1201662225 is an frugal number, since it uses more digits than its factorization.

1201662225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4638 (or 2319 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The cubic root of 1201662225 is about 1063.1490032601.

The spelling of 1201662225 in words is "one billion, two hundred one million, six hundred sixty-two thousand, two hundred twenty-five".