140521446 has 64 divisors (see below), whose sum is σ = 343526400. Its totient is φ = 42307488.

The previous prime is 140521441. The next prime is 140521471. The reversal of 140521446 is 644125041.

140521446 is a `hidden beast` number, since 1 + 405 + 214 + 46 = 666.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140521441) 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 31 ways as a sum of consecutive naturals, for example, 30865 + ... + 35123.

It is an arithmetic number, because the mean of its divisors is an integer number (5367600).

Almost surely, 2^140521446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140521446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171763200).

140521446 is an abundant number, since it is smaller than the sum of its proper divisors (203004954).

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

140521446 is a wasteful number, since it uses less digits than its factorization.

140521446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330 (or 4324 counting only the distinct ones).

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

The square root of 140521446 is about 11854.1742015207. The cubic root of 140521446 is about 519.8932793811.

Adding to 140521446 its reverse (644125041), we get a palindrome (784646487).

The spelling of 140521446 in words is "one hundred forty million, five hundred twenty-one thousand, four hundred forty-six".