1242085969 has 2 divisors, whose sum is σ = 1242085970. Its totient is φ = 1242085968.

The previous prime is 1242085937. The next prime is 1242085973. The reversal of 1242085969 is 9695802421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1068505344 + 173580625 = 32688^2 + 13175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242085969 - 2⁵ = 1242085937 is a prime.

It is a super-2 number, since 2×1242085969² = 3085555108773337922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1242085769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621042984 + 621042985.

It is an arithmetic number, because the mean of its divisors is an integer number (621042985).

Almost surely, 2^1242085969 is an apocalyptic number.

It is an amenable number.

1242085969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242085969 is an equidigital number, since it uses as much as digits as its factorization.

1242085969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 1242085969 is about 35243.2400468515. The cubic root of 1242085969 is about 1074.9391619437.

It can be divided in two parts, 12420 and 85969, that added together give a palindrome (98389).

The spelling of 1242085969 in words is "one billion, two hundred forty-two million, eighty-five thousand, nine hundred sixty-nine".