1251105097 has 12 divisors (see below), whose sum is σ = 1378934928. Its totient is φ = 1125645800.

The previous prime is 1251105077. The next prime is 1251105113. The reversal of 1251105097 is 7905011521.

It is not a de Polignac number, because 1251105097 - 2⁷ = 1251104969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251105077) 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 11 ways as a sum of consecutive naturals, for example, 1212972 + ... + 1214002.

It is an arithmetic number, because the mean of its divisors is an integer number (114911244).

Almost surely, 2^1251105097 is an apocalyptic number.

It is an amenable number.

1251105097 is a deficient number, since it is larger than the sum of its proper divisors (127829831).

1251105097 is an equidigital number, since it uses as much as digits as its factorization.

1251105097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180 (or 1149 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 31.

The square root of 1251105097 is about 35370.9640383182. The cubic root of 1251105097 is about 1077.5346994207.

The spelling of 1251105097 in words is "one billion, two hundred fifty-one million, one hundred five thousand, ninety-seven".