1326280631 has 16 divisors (see below), whose sum is σ = 1440552960. Its totient is φ = 1213803360.

The previous prime is 1326280603. The next prime is 1326280649. The reversal of 1326280631 is 1360826231.

It is a cyclic number.

It is not a de Polignac number, because 1326280631 - 2⁶ = 1326280567 is a prime.

It is a super-2 number, since 2×1326280631² = 3518040624331516322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326280031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1076786 + ... + 1078016.

It is an arithmetic number, because the mean of its divisors is an integer number (90034560).

Almost surely, 2^1326280631 is an apocalyptic number.

1326280631 is a deficient number, since it is larger than the sum of its proper divisors (114272329).

1326280631 is a wasteful number, since it uses less digits than its factorization.

1326280631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1326280631 is about 36418.1360176492. The cubic root of 1326280631 is about 1098.6983587091.

The spelling of 1326280631 in words is "one billion, three hundred twenty-six million, two hundred eighty thousand, six hundred thirty-one".