1245522001 has 8 divisors (see below), whose sum is σ = 1270831464. Its totient is φ = 1220467200.

The previous prime is 1245521969. The next prime is 1245522011. The reversal of 1245522001 is 1002255421.

It can be written as a sum of positive squares in 4 ways, for example, as 666878976 + 578643025 = 25824^2 + 24055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1245522001 - 2⁵ = 1245521969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245522011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53770 + ... + 73363.

It is an arithmetic number, because the mean of its divisors is an integer number (158853933).

Almost surely, 2^1245522001 is an apocalyptic number.

It is an amenable number.

1245522001 is a deficient number, since it is larger than the sum of its proper divisors (25309463).

1245522001 is a wasteful number, since it uses less digits than its factorization.

1245522001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127331.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1245522001 is about 35291.9537713627. The cubic root of 1245522001 is about 1075.9294650377.

Adding to 1245522001 its reverse (1002255421), we get a palindrome (2247777422).

The spelling of 1245522001 in words is "one billion, two hundred forty-five million, five hundred twenty-two thousand, one".