120421535 has 16 divisors (see below), whose sum is σ = 156177504. Its totient is φ = 88609152.

The previous prime is 120421531. The next prime is 120421547. The reversal of 120421535 is 535124021.

It is a cyclic number.

It is not a de Polignac number, because 120421535 - 2² = 120421531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120421535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120421531) 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, 15884 + ... + 22206.

It is an arithmetic number, because the mean of its divisors is an integer number (9761094).

Almost surely, 2^120421535 is an apocalyptic number.

120421535 is a deficient number, since it is larger than the sum of its proper divisors (35755969).

120421535 is a wasteful number, since it uses less digits than its factorization.

120421535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6634.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 120421535 is about 10973.6746352350. The cubic root of 120421535 is about 493.8192925237.

Adding to 120421535 its reverse (535124021), we get a palindrome (655545556).

The spelling of 120421535 in words is "one hundred twenty million, four hundred twenty-one thousand, five hundred thirty-five".