1252155603 has 4 divisors (see below), whose sum is σ = 1669540808. Its totient is φ = 834770400.

The previous prime is 1252155577. The next prime is 1252155659. The reversal of 1252155603 is 3065512521.

It is a happy number.

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

It is not a de Polignac number, because 1252155603 - 2¹³ = 1252147411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252155403) 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 3 ways as a sum of consecutive naturals, for example, 208692598 + ... + 208692603.

It is an arithmetic number, because the mean of its divisors is an integer number (417385202).

Almost surely, 2^1252155603 is an apocalyptic number.

1252155603 is a deficient number, since it is larger than the sum of its proper divisors (417385205).

1252155603 is an equidigital number, since it uses as much as digits as its factorization.

1252155603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417385204.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 1252155603 is about 35385.8107579860. The cubic root of 1252155603 is about 1077.8362035328.

The spelling of 1252155603 in words is "one billion, two hundred fifty-two million, one hundred fifty-five thousand, six hundred three".