1085431247 has 2 divisors, whose sum is σ = 1085431248. Its totient is φ = 1085431246.

The previous prime is 1085431213. The next prime is 1085431279. The reversal of 1085431247 is 7421345801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1085431247 - 2⁸ = 1085430991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1085431447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542715623 + 542715624.

It is an arithmetic number, because the mean of its divisors is an integer number (542715624).

Almost surely, 2^1085431247 is an apocalyptic number.

1085431247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085431247 is an equidigital number, since it uses as much as digits as its factorization.

1085431247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 1085431247 is about 32945.8836123726. The cubic root of 1085431247 is about 1027.7025636869.

The spelling of 1085431247 in words is "one billion, eighty-five million, four hundred thirty-one thousand, two hundred forty-seven".