1251153205 has 16 divisors (see below), whose sum is σ = 1540324800. Its totient is φ = 975293568.

The previous prime is 1251153181. The next prime is 1251153209. The reversal of 1251153205 is 5023511521.

It is a cyclic number.

It is not a de Polignac number, because 1251153205 - 2⁷ = 1251153077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1251153205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251153209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9646 + ... + 50944.

It is an arithmetic number, because the mean of its divisors is an integer number (96270300).

Almost surely, 2^1251153205 is an apocalyptic number.

It is an amenable number.

1251153205 is a deficient number, since it is larger than the sum of its proper divisors (289171595).

1251153205 is an equidigital number, since it uses as much as digits as its factorization.

1251153205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41460.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1251153205 is about 35371.6440810998. The cubic root of 1251153205 is about 1077.5485105106.

Adding to 1251153205 its reverse (5023511521), we get a palindrome (6274664726).

The spelling of 1251153205 in words is "one billion, two hundred fifty-one million, one hundred fifty-three thousand, two hundred five".