1251056153 has 4 divisors (see below), whose sum is σ = 1254115380. Its totient is φ = 1247996928.

The previous prime is 1251056141. The next prime is 1251056167. The reversal of 1251056153 is 3516501521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 894488464 + 356567689 = 29908^2 + 18883^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251056153 - 2¹⁶ = 1250990617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1251056123) 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 3 ways as a sum of consecutive naturals, for example, 1529000 + ... + 1529817.

It is an arithmetic number, because the mean of its divisors is an integer number (313528845).

Almost surely, 2^1251056153 is an apocalyptic number.

It is an amenable number.

1251056153 is a deficient number, since it is larger than the sum of its proper divisors (3059227).

1251056153 is an equidigital number, since it uses as much as digits as its factorization.

1251056153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3059226.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1251056153 is about 35370.2721646300. The cubic root of 1251056153 is about 1077.5206479643.

Adding to 1251056153 its reverse (3516501521), we get a palindrome (4767557674).

The spelling of 1251056153 in words is "one billion, two hundred fifty-one million, fifty-six thousand, one hundred fifty-three".