140021532 has 72 divisors (see below), whose sum is σ = 405621216. Its totient is φ = 39896064.

The previous prime is 140021501. The next prime is 140021543. The reversal of 140021532 is 235120041.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148968 + ... + 149904.

It is an arithmetic number, because the mean of its divisors is an integer number (5633628).

Almost surely, 2^140021532 is an apocalyptic number.

140021532 is a gapful number since it is divisible by the number (12) 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 140021532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202810608).

140021532 is an abundant number, since it is smaller than the sum of its proper divisors (265599684).

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

140021532 is a wasteful number, since it uses less digits than its factorization.

140021532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547 (or 1542 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 140021532 is about 11833.0694242872. The cubic root of 140021532 is about 519.2760290069.

Adding to 140021532 its reverse (235120041), we get a palindrome (375141573).

The spelling of 140021532 in words is "one hundred forty million, twenty-one thousand, five hundred thirty-two".