1200225601 has 4 divisors (see below), whose sum is σ = 1200634452. Its totient is φ = 1199816752.

The previous prime is 1200225557. The next prime is 1200225617. The reversal of 1200225601 is 1065220021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1065220021 = 167 ⋅6378563.

It can be written as a sum of positive squares in 2 ways, for example, as 192099600 + 1008126001 = 13860^2 + 31751^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200225601 - 2¹¹ = 1200223553 is a prime.

It is a super-2 number, since 2×1200225601² = 2881082986591622402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200225641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199990 + ... + 205903.

It is an arithmetic number, because the mean of its divisors is an integer number (300158613).

Almost surely, 2^1200225601 is an apocalyptic number.

It is an amenable number.

1200225601 is a deficient number, since it is larger than the sum of its proper divisors (408851).

1200225601 is an equidigital number, since it uses as much as digits as its factorization.

1200225601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408850.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1200225601 is about 34644.2722682986. The cubic root of 1200225601 is about 1062.7251585753.

Adding to 1200225601 its reverse (1065220021), we get a palindrome (2265445622).

It can be divided in two parts, 1200 and 225601, that added together give a triangular number (226801 = T₆₇₃).

The spelling of 1200225601 in words is "one billion, two hundred million, two hundred twenty-five thousand, six hundred one".