1242985927 has 2 divisors, whose sum is σ = 1242985928. Its totient is φ = 1242985926.

The previous prime is 1242985883. The next prime is 1242985973. The reversal of 1242985927 is 7295892421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242985927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242985027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621492963 + 621492964.

It is an arithmetic number, because the mean of its divisors is an integer number (621492964).

Almost surely, 2^1242985927 is an apocalyptic number.

1242985927 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242985927 is an equidigital number, since it uses as much as digits as its factorization.

1242985927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 49.

The square root of 1242985927 is about 35256.0055451550. The cubic root of 1242985927 is about 1075.1987163203.

The spelling of 1242985927 in words is "one billion, two hundred forty-two million, nine hundred eighty-five thousand, nine hundred twenty-seven".