1201440531 has 4 divisors (see below), whose sum is σ = 1601920712. Its totient is φ = 800960352.

The previous prime is 1201440503. The next prime is 1201440607. The reversal of 1201440531 is 1350441021.

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

It is not a de Polignac number, because 1201440531 - 2⁶ = 1201440467 is a prime.

It is a super-2 number, since 2×1201440531² = 2886918699059123922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201440498 and 1201440507.

It is not an unprimeable number, because it can be changed into a prime (1201440131) 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, 200240086 + ... + 200240091.

It is an arithmetic number, because the mean of its divisors is an integer number (400480178).

Almost surely, 2^1201440531 is an apocalyptic number.

1201440531 is a deficient number, since it is larger than the sum of its proper divisors (400480181).

1201440531 is an equidigital number, since it uses as much as digits as its factorization.

1201440531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400480180.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1201440531 is about 34661.8021891534. The cubic root of 1201440531 is about 1063.0836193150.

Adding to 1201440531 its reverse (1350441021), we get a palindrome (2551881552).

The spelling of 1201440531 in words is "one billion, two hundred one million, four hundred forty thousand, five hundred thirty-one".