1525123303 has 4 divisors (see below), whose sum is σ = 1663770888. Its totient is φ = 1386475720.

The previous prime is 1525123279. The next prime is 1525123333. The reversal of 1525123303 is 3033215251.

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 1525123303 - 2⁹ = 1525122791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525123333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69323776 + ... + 69323797.

It is an arithmetic number, because the mean of its divisors is an integer number (415942722).

Almost surely, 2^1525123303 is an apocalyptic number.

1525123303 is a deficient number, since it is larger than the sum of its proper divisors (138647585).

1525123303 is a wasteful number, since it uses less digits than its factorization.

1525123303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138647584.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 1525123303 is about 39052.8270807633. The cubic root of 1525123303 is about 1151.0697803383.

Adding to 1525123303 its reverse (3033215251), we get a palindrome (4558338554).

The spelling of 1525123303 in words is "one billion, five hundred twenty-five million, one hundred twenty-three thousand, three hundred three".