120421541 has 4 divisors (see below), whose sum is σ = 120444300. Its totient is φ = 120398784.

The previous prime is 120421531. The next prime is 120421547. The reversal of 120421541 is 145124021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145124021 = 7 ⋅20732003.

It can be written as a sum of positive squares in 2 ways, for example, as 60684100 + 59737441 = 7790^2 + 7729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120421541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120421547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1175 + ... + 15563.

It is an arithmetic number, because the mean of its divisors is an integer number (30111075).

Almost surely, 2^120421541 is an apocalyptic number.

It is an amenable number.

120421541 is a deficient number, since it is larger than the sum of its proper divisors (22759).

120421541 is an equidigital number, since it uses as much as digits as its factorization.

120421541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22758.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 120421541 is about 10973.6749086165. The cubic root of 120421541 is about 493.8193007252.

Adding to 120421541 its reverse (145124021), we get a palindrome (265545562).

The spelling of 120421541 in words is "one hundred twenty million, four hundred twenty-one thousand, five hundred forty-one".