1245109803 has 8 divisors (see below), whose sum is σ = 1897310208. Its totient is φ = 711491304.

The previous prime is 1245109787. The next prime is 1245109813. The reversal of 1245109803 is 3089015421.

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

It is not a de Polignac number, because 1245109803 - 2⁴ = 1245109787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245109813) 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 7 ways as a sum of consecutive naturals, for example, 29645451 + ... + 29645492.

It is an arithmetic number, because the mean of its divisors is an integer number (237163776).

Almost surely, 2^1245109803 is an apocalyptic number.

1245109803 is a deficient number, since it is larger than the sum of its proper divisors (652200405).

1245109803 is an equidigital number, since it uses as much as digits as its factorization.

1245109803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59290953.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1245109803 is about 35286.1134584131. The cubic root of 1245109803 is about 1075.8107611512.

The spelling of 1245109803 in words is "one billion, two hundred forty-five million, one hundred nine thousand, eight hundred three".