1279419252 has 96 divisors (see below), whose sum is σ = 3311788032. Its totient is φ = 382373376.

The previous prime is 1279419247. The next prime is 1279419257. The reversal of 1279419252 is 2529149721.

It is an interprime number because it is at equal distance from previous prime (1279419247) and next prime (1279419257).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279419257) 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 31 ways as a sum of consecutive naturals, for example, 1721593 + ... + 1722335.

It is an arithmetic number, because the mean of its divisors is an integer number (34497792).

Almost surely, 2^1279419252 is an apocalyptic number.

1279419252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1279419252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1655894016).

1279419252 is an abundant number, since it is smaller than the sum of its proper divisors (2032368780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1279419252 is a wasteful number, since it uses less digits than its factorization.

1279419252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157 (or 1155 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 1279419252 is about 35768.9705191525. The cubic root of 1279419252 is about 1085.6028142348.

The spelling of 1279419252 in words is "one billion, two hundred seventy-nine million, four hundred nineteen thousand, two hundred fifty-two".