1252020168 has 72 divisors (see below), whose sum is σ = 3944513430. Its totient is φ = 357719040.

The previous prime is 1252020167. The next prime is 1252020251. The reversal of 1252020168 is 8610202521.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1189008324 + 63011844 = 34482^2 + 7938^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (1252020167) 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 17 ways as a sum of consecutive naturals, for example, 173913 + ... + 180968.

Almost surely, 2^1252020168 is an apocalyptic number.

1252020168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1252020168 is an abundant number, since it is smaller than the sum of its proper divisors (2692493262).

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

1252020168 is a wasteful number, since it uses less digits than its factorization.

1252020168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354907 (or 354893 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1252020168 is about 35383.8970154504. The cubic root of 1252020168 is about 1077.7973420129.

Adding to 1252020168 its reverse (8610202521), we get a palindrome (9862222689).

The spelling of 1252020168 in words is "one billion, two hundred fifty-two million, twenty thousand, one hundred sixty-eight".