1145431004 has 36 divisors (see below), whose sum is σ = 2101488480. Its totient is φ = 546237120.

The previous prime is 1145431003. The next prime is 1145431019. The reversal of 1145431004 is 4001345411.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145431003) 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, 1101917 + ... + 1102955.

It is an arithmetic number, because the mean of its divisors is an integer number (58374680).

Almost surely, 2^1145431004 is an apocalyptic number.

It is an amenable number.

1145431004 is a deficient number, since it is larger than the sum of its proper divisors (956057476).

1145431004 is a wasteful number, since it uses less digits than its factorization.

1145431004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610 (or 1585 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1145431004 is about 33844.2166994599. The cubic root of 1145431004 is about 1046.3002074010.

Adding to 1145431004 its reverse (4001345411), we get a palindrome (5146776415).

The spelling of 1145431004 in words is "one billion, one hundred forty-five million, four hundred thirty-one thousand, four".