1251200153 has 12 divisors (see below), whose sum is σ = 1541095092. Its totient is φ = 1009370880.

The previous prime is 1251200147. The next prime is 1251200173. The reversal of 1251200153 is 3510021521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 410953984 + 840246169 = 20272^2 + 28987^2 .

It is not a de Polignac number, because 1251200153 - 2⁶ = 1251200089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251200173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 750188 + ... + 751853.

It is an arithmetic number, because the mean of its divisors is an integer number (128424591).

Almost surely, 2^1251200153 is an apocalyptic number.

It is an amenable number.

1251200153 is a deficient number, since it is larger than the sum of its proper divisors (289894939).

1251200153 is a wasteful number, since it uses less digits than its factorization.

1251200153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502072 (or 1502065 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1251200153 is about 35372.3077138035. The cubic root of 1251200153 is about 1077.5619882404.

Adding to 1251200153 its reverse (3510021521), we get a palindrome (4761221674).

The spelling of 1251200153 in words is "one billion, two hundred fifty-one million, two hundred thousand, one hundred fifty-three".