1251612201 has 8 divisors (see below), whose sum is σ = 1907218624. Its totient is φ = 715206960.

The previous prime is 1251612163. The next prime is 1251612221. The reversal of 1251612201 is 1022161521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1251612201 - 2¹¹ = 1251610153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 59600581 = 1251612201 / (1 + 2 + 5 + 1 + 6 + 1 + 2 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251612221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29800270 + ... + 29800311.

It is an arithmetic number, because the mean of its divisors is an integer number (238402328).

Almost surely, 2^1251612201 is an apocalyptic number.

It is an amenable number.

1251612201 is a deficient number, since it is larger than the sum of its proper divisors (655606423).

1251612201 is an equidigital number, since it uses as much as digits as its factorization.

1251612201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59600591.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1251612201 is about 35378.1316776339. The cubic root of 1251612201 is about 1077.6802636231.

Adding to 1251612201 its reverse (1022161521), we get a palindrome (2273773722).

The spelling of 1251612201 in words is "one billion, two hundred fifty-one million, six hundred twelve thousand, two hundred one".