1285200031 has 2 divisors, whose sum is σ = 1285200032. Its totient is φ = 1285200030.

The previous prime is 1285200029. The next prime is 1285200041. The reversal of 1285200031 is 1300025821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1285200031 - 2¹ = 1285200029 is a prime.

It is a super-2 number, since 2×1285200031² = 3303478239364801922, which contains 22 as substring.

Together with 1285200029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1285199975 and 1285200011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285200041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642600015 + 642600016.

It is an arithmetic number, because the mean of its divisors is an integer number (642600016).

Almost surely, 2^1285200031 is an apocalyptic number.

1285200031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285200031 is an equidigital number, since it uses as much as digits as its factorization.

1285200031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1285200031 is about 35849.6866234560. The cubic root of 1285200031 is about 1087.2353783593.

Adding to 1285200031 its reverse (1300025821), we get a palindrome (2585225852).

The spelling of 1285200031 in words is "one billion, two hundred eighty-five million, two hundred thousand, thirty-one".