1200040531 has 2 divisors, whose sum is σ = 1200040532. Its totient is φ = 1200040530.

The previous prime is 1200040529. The next prime is 1200040547. The reversal of 1200040531 is 1350400021.

It is an a-pointer prime, because the next prime (1200040547) can be obtained adding 1200040531 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200040531 - 2¹ = 1200040529 is a prime.

It is a super-2 number, since 2×1200040531² = 2880194552085523922, which contains 22 as substring.

Together with 1200040529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1200040031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600020265 + 600020266.

It is an arithmetic number, because the mean of its divisors is an integer number (600020266).

Almost surely, 2^1200040531 is an apocalyptic number.

1200040531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200040531 is an equidigital number, since it uses as much as digits as its factorization.

1200040531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1200040531 is about 34641.6011610318. The cubic root of 1200040531 is about 1062.6705331075.

Adding to 1200040531 its reverse (1350400021), we get a palindrome (2550440552).

The spelling of 1200040531 in words is "one billion, two hundred million, forty thousand, five hundred thirty-one".