140410021 has 16 divisors (see below), whose sum is σ = 151538688. Its totient is φ = 129625600.

The previous prime is 140410013. The next prime is 140410027. The reversal of 140410021 is 120014041.

It is a cyclic number.

It is not a de Polignac number, because 140410021 - 2³ = 140410013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140409983 and 140410010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140410027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269241 + ... + 269761.

It is an arithmetic number, because the mean of its divisors is an integer number (9471168).

Almost surely, 2^140410021 is an apocalyptic number.

It is an amenable number.

140410021 is a deficient number, since it is larger than the sum of its proper divisors (11128667).

140410021 is a wasteful number, since it uses less digits than its factorization.

140410021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 140410021 is about 11849.4734482170. The cubic root of 140410021 is about 519.7558284119.

Adding to 140410021 its reverse (120014041), we get a palindrome (260424062).

The spelling of 140410021 in words is "one hundred forty million, four hundred ten thousand, twenty-one".