1252621422 has 160 divisors (see below), whose sum is σ = 3150433440. Its totient is φ = 369515520.

The previous prime is 1252621369. The next prime is 1252621427. The reversal of 1252621422 is 2241262521.

1252621422 is a `hidden beast` number, since 12 + 5 + 2 + 621 + 4 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (3840) is a multiple of the sum of its prime factors (320).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252621427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7684713 + ... + 7684875.

It is an arithmetic number, because the mean of its divisors is an integer number (19690209).

Almost surely, 2^1252621422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1252621422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1575216720).

1252621422 is an abundant number, since it is smaller than the sum of its proper divisors (1897812018).

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

1252621422 is a wasteful number, since it uses less digits than its factorization.

1252621422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 311 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 1252621422 is about 35392.3921485960. The cubic root of 1252621422 is about 1077.9698435624.

Adding to 1252621422 its reverse (2241262521), we get a palindrome (3493883943).

The spelling of 1252621422 in words is "one billion, two hundred fifty-two million, six hundred twenty-one thousand, four hundred twenty-two".