1285479931 has 2 divisors, whose sum is σ = 1285479932. Its totient is φ = 1285479930.

The previous prime is 1285479907. The next prime is 1285479947. The reversal of 1285479931 is 1399745821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1285479931 - 2¹¹ = 1285477883 is a prime.

It is a super-2 number, since 2×1285479931² = 3304917306007529522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1285479991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642739965 + 642739966.

It is an arithmetic number, because the mean of its divisors is an integer number (642739966).

Almost surely, 2^1285479931 is an apocalyptic number.

1285479931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285479931 is an equidigital number, since it uses as much as digits as its factorization.

1285479931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 49.

The square root of 1285479931 is about 35853.5902107446. The cubic root of 1285479931 is about 1087.3143012470.

The spelling of 1285479931 in words is "one billion, two hundred eighty-five million, four hundred seventy-nine thousand, nine hundred thirty-one".