1245551051 has 4 divisors (see below), whose sum is σ = 1261317600. Its totient is φ = 1229784504.

The previous prime is 1245551033. The next prime is 1245551063. The reversal of 1245551051 is 1501555421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1245551051 - 2³⁰ = 171809227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245551071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7883156 + ... + 7883313.

It is an arithmetic number, because the mean of its divisors is an integer number (315329400).

Almost surely, 2^1245551051 is an apocalyptic number.

1245551051 is a deficient number, since it is larger than the sum of its proper divisors (15766549).

1245551051 is an equidigital number, since it uses as much as digits as its factorization.

1245551051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15766548.

The product of its (nonzero) digits is 5000, while the sum is 29.

The square root of 1245551051 is about 35292.3653358627. The cubic root of 1245551051 is about 1075.9378298058.

The spelling of 1245551051 in words is "one billion, two hundred forty-five million, five hundred fifty-one thousand, fifty-one".