1252478895 has 16 divisors (see below), whose sum is σ = 2068611072. Its totient is φ = 646440480.

The previous prime is 1252478891. The next prime is 1252478911. The reversal of 1252478895 is 5988742521.

It is not a de Polignac number, because 1252478895 - 2² = 1252478891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252478891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1346287 + ... + 1347216.

It is an arithmetic number, because the mean of its divisors is an integer number (129288192).

Almost surely, 2^1252478895 is an apocalyptic number.

1252478895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1252478895 is a deficient number, since it is larger than the sum of its proper divisors (816132177).

1252478895 is a wasteful number, since it uses less digits than its factorization.

1252478895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693542.

The product of its digits is 1612800, while the sum is 51.

The square root of 1252478895 is about 35390.3785653672. The cubic root of 1252478895 is about 1077.9289571374.

It can be divided in two parts, 12524 and 78895, that added together give a palindrome (91419).

The spelling of 1252478895 in words is "one billion, two hundred fifty-two million, four hundred seventy-eight thousand, eight hundred ninety-five".