1285368457 has 2 divisors, whose sum is σ = 1285368458. Its totient is φ = 1285368456.

The previous prime is 1285368389. The next prime is 1285368467. The reversal of 1285368457 is 7548635821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 970696336 + 314672121 = 31156^2 + 17739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1285368457 - 2¹¹ = 1285366409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1285368457.

It is not a weakly prime, because it can be changed into another prime (1285368467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642684228 + 642684229.

It is an arithmetic number, because the mean of its divisors is an integer number (642684229).

Almost surely, 2^1285368457 is an apocalyptic number.

It is an amenable number.

1285368457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285368457 is an equidigital number, since it uses as much as digits as its factorization.

1285368457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612800, while the sum is 49.

The square root of 1285368457 is about 35852.0356046906. The cubic root of 1285368457 is about 1087.2828705013.

The spelling of 1285368457 in words is "one billion, two hundred eighty-five million, three hundred sixty-eight thousand, four hundred fifty-seven".