1252023140 has 72 divisors (see below), whose sum is σ = 2807384832. Its totient is φ = 468928000.

The previous prime is 1252023139. The next prime is 1252023151. The reversal of 1252023140 is 413202521.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1450349 + ... + 1451211.

It is an arithmetic number, because the mean of its divisors is an integer number (38991456).

Almost surely, 2^1252023140 is an apocalyptic number.

1252023140 is a gapful number since it is divisible by the number (10) 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 1252023140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1403692416).

1252023140 is an abundant number, since it is smaller than the sum of its proper divisors (1555361692).

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

1252023140 is a wasteful number, since it uses less digits than its factorization.

1252023140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1252023140 is about 35383.9390119303. The cubic root of 1252023140 is about 1077.7981948243.

Adding to 1252023140 its reverse (413202521), we get a palindrome (1665225661).

The spelling of 1252023140 in words is "one billion, two hundred fifty-two million, twenty-three thousand, one hundred forty".