1126720251 has 24 divisors (see below), whose sum is σ = 1711656960. Its totient is φ = 712814256.

The previous prime is 1126720249. The next prime is 1126720253. The reversal of 1126720251 is 1520276211.

It is an interprime number because it is at equal distance from previous prime (1126720249) and next prime (1126720253).

It is not a de Polignac number, because 1126720251 - 2¹ = 1126720249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1126720253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4860 + ... + 47718.

It is an arithmetic number, because the mean of its divisors is an integer number (71319040).

Almost surely, 2^1126720251 is an apocalyptic number.

1126720251 is a deficient number, since it is larger than the sum of its proper divisors (584936709).

1126720251 is a wasteful number, since it uses less digits than its factorization.

1126720251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43015 (or 43012 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 1126720251 is about 33566.6538546814. The cubic root of 1126720251 is about 1040.5717550767.

Adding to 1126720251 its reverse (1520276211), we get a palindrome (2646996462).

The spelling of 1126720251 in words is "one billion, one hundred twenty-six million, seven hundred twenty thousand, two hundred fifty-one".