1325643003 has 12 divisors (see below), whose sum is σ = 1985737208. Its totient is φ = 883761840.

The previous prime is 1325642971. The next prime is 1325643089. The reversal of 1325643003 is 3003465231.

It is a happy number.

1325643003 is a `hidden beast` number, since 13 + 2 + 5 + 643 + 0 + 0 + 3 = 666.

It is not a de Polignac number, because 1325643003 - 2⁵ = 1325642971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325643703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2727418 + ... + 2727903.

Almost surely, 2^1325643003 is an apocalyptic number.

1325643003 is a deficient number, since it is larger than the sum of its proper divisors (660094205).

1325643003 is an frugal number, since it uses more digits than its factorization.

1325643003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5455336 (or 5455324 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 1325643003 is about 36409.3807005832. The cubic root of 1325643003 is about 1098.5222589409.

The spelling of 1325643003 in words is "one billion, three hundred twenty-five million, six hundred forty-three thousand, three".