1145013431 has 4 divisors (see below), whose sum is σ = 1166617512. Its totient is φ = 1123409352.

The previous prime is 1145013407. The next prime is 1145013479. The reversal of 1145013431 is 1343105411.

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: 1343105411 = 31 ⋅43325981.

It is a cyclic number.

It is not a de Polignac number, because 1145013431 - 2⁶ = 1145013367 is a prime.

It is a super-2 number, since 2×1145013431² = 2622111514340783522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1145013397 and 1145013406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145013481) 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, 10801961 + ... + 10802066.

It is an arithmetic number, because the mean of its divisors is an integer number (291654378).

Almost surely, 2^1145013431 is an apocalyptic number.

1145013431 is a deficient number, since it is larger than the sum of its proper divisors (21604081).

1145013431 is an equidigital number, since it uses as much as digits as its factorization.

1145013431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21604080.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1145013431 is about 33838.0470919939. The cubic root of 1145013431 is about 1046.1730471682.

Adding to 1145013431 its reverse (1343105411), we get a palindrome (2488118842).

The spelling of 1145013431 in words is "one billion, one hundred forty-five million, thirteen thousand, four hundred thirty-one".