1252350021 has 16 divisors (see below), whose sum is σ = 1892891840. Its totient is φ = 730114560.

The previous prime is 1252350019. The next prime is 1252350037. The reversal of 1252350021 is 1200532521.

It is not a de Polignac number, because 1252350021 - 2¹ = 1252350019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1252350021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252350521) 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 15 ways as a sum of consecutive naturals, for example, 844300 + ... + 845781.

It is an arithmetic number, because the mean of its divisors is an integer number (118305740).

Almost surely, 2^1252350021 is an apocalyptic number.

It is an amenable number.

1252350021 is a deficient number, since it is larger than the sum of its proper divisors (640541819).

1252350021 is a wasteful number, since it uses less digits than its factorization.

1252350021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690116.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1252350021 is about 35388.5577694260. The cubic root of 1252350021 is about 1077.8919846498.

Adding to 1252350021 its reverse (1200532521), we get a palindrome (2452882542).

The spelling of 1252350021 in words is "one billion, two hundred fifty-two million, three hundred fifty thousand, twenty-one".