120531451 has 4 divisors (see below), whose sum is σ = 123334552. Its totient is φ = 117728352.

The previous prime is 120531443. The next prime is 120531457. The reversal of 120531451 is 154135021.

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: 154135021 = 311 ⋅495611.

It is a cyclic number.

It is not a de Polignac number, because 120531451 - 2³ = 120531443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120531457) 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, 1401486 + ... + 1401571.

It is an arithmetic number, because the mean of its divisors is an integer number (30833638).

Almost surely, 2^120531451 is an apocalyptic number.

120531451 is a deficient number, since it is larger than the sum of its proper divisors (2803101).

120531451 is an equidigital number, since it uses as much as digits as its factorization.

120531451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803100.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 120531451 is about 10978.6816603816. The cubic root of 120531451 is about 493.9694930540.

Adding to 120531451 its reverse (154135021), we get a palindrome (274666472).

The spelling of 120531451 in words is "one hundred twenty million, five hundred thirty-one thousand, four hundred fifty-one".