1025403023 has 4 divisors (see below), whose sum is σ = 1027244520. Its totient is φ = 1023561528.

The previous prime is 1025403011. The next prime is 1025403047. The reversal of 1025403023 is 3203045201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3203045201 = 3617 ⋅885553.

It is a cyclic number.

It is not a de Polignac number, because 1025403023 - 2²⁶ = 958294159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1025402986 and 1025403004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025403053) 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, 919913 + ... + 921026.

It is an arithmetic number, because the mean of its divisors is an integer number (256811130).

Almost surely, 2^1025403023 is an apocalyptic number.

1025403023 is a deficient number, since it is larger than the sum of its proper divisors (1841497).

1025403023 is an equidigital number, since it uses as much as digits as its factorization.

1025403023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841496.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1025403023 is about 32021.9147303843. The cubic root of 1025403023 is about 1008.3969679091.

Adding to 1025403023 its reverse (3203045201), we get a palindrome (4228448224).

The spelling of 1025403023 in words is "one billion, twenty-five million, four hundred three thousand, twenty-three".