140821351 has 16 divisors (see below), whose sum is σ = 155976480. Its totient is φ = 126074880.

The previous prime is 140821349. The next prime is 140821363. The reversal of 140821351 is 153128041.

It is a 14-Lehmer number, since φ(140821351) divides (140821351-1)¹⁴.

It is a cyclic number.

It is not a de Polignac number, because 140821351 - 2¹ = 140821349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140821451) 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, 307915 + ... + 308371.

It is an arithmetic number, because the mean of its divisors is an integer number (9748530).

Almost surely, 2^140821351 is an apocalyptic number.

140821351 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

140821351 is a deficient number, since it is larger than the sum of its proper divisors (15155129).

140821351 is a wasteful number, since it uses less digits than its factorization.

140821351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 140821351 is about 11866.8172228277. The cubic root of 140821351 is about 520.2628737448.

Adding to 140821351 its reverse (153128041), we get a palindrome (293949392).

The spelling of 140821351 in words is "one hundred forty million, eight hundred twenty-one thousand, three hundred fifty-one".