1245087997 has 2 divisors, whose sum is σ = 1245087998. Its totient is φ = 1245087996.

The previous prime is 1245087967. The next prime is 1245088037. The reversal of 1245087997 is 7997805421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1204714681 + 40373316 = 34709^2 + 6354^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245087997 - 2¹¹ = 1245085949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245087967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622543998 + 622543999.

It is an arithmetic number, because the mean of its divisors is an integer number (622543999).

Almost surely, 2^1245087997 is an apocalyptic number.

It is an amenable number.

1245087997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245087997 is an equidigital number, since it uses as much as digits as its factorization.

1245087997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The square root of 1245087997 is about 35285.8044686528. The cubic root of 1245087997 is about 1075.8044807770.

The spelling of 1245087997 in words is "one billion, two hundred forty-five million, eighty-seven thousand, nine hundred ninety-seven".