1245535001 has 2 divisors, whose sum is σ = 1245535002. Its totient is φ = 1245535000.

The previous prime is 1245534967. The next prime is 1245535003. The reversal of 1245535001 is 1005355421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 894010000 + 351525001 = 29900^2 + 18749^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1245535001 is a prime.

Together with 1245535003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1245535003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622767500 + 622767501.

It is an arithmetic number, because the mean of its divisors is an integer number (622767501).

Almost surely, 2^1245535001 is an apocalyptic number.

It is an amenable number.

1245535001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245535001 is an equidigital number, since it uses as much as digits as its factorization.

1245535001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1245535001 is about 35292.1379488407. The cubic root of 1245535001 is about 1075.9332083235.

The spelling of 1245535001 in words is "one billion, two hundred forty-five million, five hundred thirty-five thousand, one".