1251078897 has 4 divisors (see below), whose sum is σ = 1668105200. Its totient is φ = 834052596.

The previous prime is 1251078889. The next prime is 1251078901. The reversal of 1251078897 is 7988701521.

It is a happy number.

1251078897 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1251078897 - 2³ = 1251078889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251078497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208513147 + ... + 208513152.

It is an arithmetic number, because the mean of its divisors is an integer number (417026300).

Almost surely, 2^1251078897 is an apocalyptic number.

It is an amenable number.

1251078897 is a deficient number, since it is larger than the sum of its proper divisors (417026303).

1251078897 is an equidigital number, since it uses as much as digits as its factorization.

1251078897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417026302.

The product of its (nonzero) digits is 282240, while the sum is 48.

The square root of 1251078897 is about 35370.5936761033. The cubic root of 1251078897 is about 1077.5271776422.

The spelling of 1251078897 in words is "one billion, two hundred fifty-one million, seventy-eight thousand, eight hundred ninety-seven".