1251115201 has 8 divisors (see below), whose sum is σ = 1431730944. Its totient is φ = 1070970720.

The previous prime is 1251115193. The next prime is 1251115241. The reversal of 1251115201 is 1025111521.

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

It is a cyclic number.

It is not a de Polignac number, because 1251115201 - 2³ = 1251115193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1251115241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112105 + ... + 122758.

It is an arithmetic number, because the mean of its divisors is an integer number (178966368).

Almost surely, 2^1251115201 is an apocalyptic number.

It is an amenable number.

1251115201 is a deficient number, since it is larger than the sum of its proper divisors (180615743).

1251115201 is an equidigital number, since it uses as much as digits as its factorization.

1251115201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235631.

The product of its (nonzero) digits is 100, while the sum is 19.

The square root of 1251115201 is about 35371.1068670462. The cubic root of 1251115201 is about 1077.5376001579.

Adding to 1251115201 its reverse (1025111521), we get a palindrome (2276226722).

It can be divided in two parts, 125111520 and 1, that added together give a palindrome (125111521).

The spelling of 1251115201 in words is "one billion, two hundred fifty-one million, one hundred fifteen thousand, two hundred one".