1285031026 has 4 divisors (see below), whose sum is σ = 1927546542. Its totient is φ = 642515512.

The previous prime is 1285031021. The next prime is 1285031029. The reversal of 1285031026 is 6201305821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6201305821 = 34157 ⋅181553.

It can be written as a sum of positive squares in only one way, i.e., 1095941025 + 189090001 = 33105^2 + 13751^2 .

It is a super-2 number, since 2×1285031026² = 3302609475565225352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1285030985 and 1285031003.

It is not an unprimeable number, because it can be changed into a prime (1285031021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321257755 + ... + 321257758.

Almost surely, 2^1285031026 is an apocalyptic number.

1285031026 is a deficient number, since it is larger than the sum of its proper divisors (642515516).

1285031026 is an equidigital number, since it uses as much as digits as its factorization.

1285031026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642515515.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1285031026 is about 35847.3294123844. The cubic root of 1285031026 is about 1087.1877187822.

Adding to 1285031026 its reverse (6201305821), we get a palindrome (7486336847).

The spelling of 1285031026 in words is "one billion, two hundred eighty-five million, thirty-one thousand, twenty-six".