1206403531 has 8 divisors (see below), whose sum is σ = 1216094544. Its totient is φ = 1196751360.

The previous prime is 1206403519. The next prime is 1206403573. The reversal of 1206403531 is 1353046021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1206403531 - 2⁷ = 1206403403 is a prime.

It is a super-2 number, since 2×1206403531² = 2910818959218535922, 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 = 1206403496 and 1206403505.

It is not an unprimeable number, because it can be changed into a prime (1206403511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54331 + ... + 73243.

It is an arithmetic number, because the mean of its divisors is an integer number (152011818).

Almost surely, 2^1206403531 is an apocalyptic number.

1206403531 is a deficient number, since it is larger than the sum of its proper divisors (9691013).

1206403531 is a wasteful number, since it uses less digits than its factorization.

1206403531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19421.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1206403531 is about 34733.3201839386. The cubic root of 1206403531 is about 1064.5454299628.

Adding to 1206403531 its reverse (1353046021), we get a palindrome (2559449552).

The spelling of 1206403531 in words is "one billion, two hundred six million, four hundred three thousand, five hundred thirty-one".