1123025431 has 4 divisors (see below), whose sum is σ = 1225118664. Its totient is φ = 1020932200.

The previous prime is 1123025339. The next prime is 1123025447. The reversal of 1123025431 is 1345203211.

It is a happy number.

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 1123025431 - 2⁷ = 1123025303 is a prime.

It is a super-2 number, since 2×1123025431² = 2522372237345471522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123025471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51046600 + ... + 51046621.

It is an arithmetic number, because the mean of its divisors is an integer number (306279666).

Almost surely, 2^1123025431 is an apocalyptic number.

1123025431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1123025431 is a deficient number, since it is larger than the sum of its proper divisors (102093233).

1123025431 is a wasteful number, since it uses less digits than its factorization.

1123025431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102093232.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1123025431 is about 33511.5715984792. The cubic root of 1123025431 is about 1039.4330708787.

Adding to 1123025431 its reverse (1345203211), we get a palindrome (2468228642).

The spelling of 1123025431 in words is "one billion, one hundred twenty-three million, twenty-five thousand, four hundred thirty-one".