140421535 has 4 divisors (see below), whose sum is σ = 168505848. Its totient is φ = 112337224.

The previous prime is 140421529. The next prime is 140421551. The reversal of 140421535 is 535124041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140421535 - 2¹⁷ = 140290463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14042149 + ... + 14042158.

It is an arithmetic number, because the mean of its divisors is an integer number (42126462).

Almost surely, 2^140421535 is an apocalyptic number.

140421535 is a deficient number, since it is larger than the sum of its proper divisors (28084313).

140421535 is an equidigital number, since it uses as much as digits as its factorization.

140421535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28084312.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 140421535 is about 11849.9592826305. The cubic root of 140421535 is about 519.7700351496.

Adding to 140421535 its reverse (535124041), we get a palindrome (675545576).

The spelling of 140421535 in words is "one hundred forty million, four hundred twenty-one thousand, five hundred thirty-five".