1252217408 has 56 divisors (see below), whose sum is σ = 2741355960. Its totient is φ = 563834880.

The previous prime is 1252217383. The next prime is 1252217413. The reversal of 1252217408 is 8047122521.

It can be written as a sum of positive squares in 4 ways, for example, as 15429184 + 1236788224 = 3928^2 + 35168^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15758 + ... + 52466.

It is an arithmetic number, because the mean of its divisors is an integer number (48952785).

Almost surely, 2^1252217408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1252217408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370677980).

1252217408 is an abundant number, since it is smaller than the sum of its proper divisors (1489138552).

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

1252217408 is a wasteful number, since it uses less digits than its factorization.

1252217408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36775 (or 36765 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 1252217408 is about 35386.6840492296. The cubic root of 1252217408 is about 1077.8539368375.

Adding to 1252217408 its reverse (8047122521), we get a palindrome (9299339929).

The spelling of 1252217408 in words is "one billion, two hundred fifty-two million, two hundred seventeen thousand, four hundred eight".