1285210279 has 2 divisors, whose sum is σ = 1285210280. Its totient is φ = 1285210278.

The previous prime is 1285210243. The next prime is 1285210291. The reversal of 1285210279 is 9720125821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1285210279 - 2²³ = 1276821671 is a prime.

It is a super-2 number, since 2×1285210279² = 3303530922494515682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285210379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642605139 + 642605140.

It is an arithmetic number, because the mean of its divisors is an integer number (642605140).

Almost surely, 2^1285210279 is an apocalyptic number.

1285210279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285210279 is an equidigital number, since it uses as much as digits as its factorization.

1285210279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1285210279 is about 35849.8295532908. The cubic root of 1285210279 is about 1087.2382681711.

The spelling of 1285210279 in words is "one billion, two hundred eighty-five million, two hundred ten thousand, two hundred seventy-nine".