1145633431 has 4 divisors (see below), whose sum is σ = 1160135200. Its totient is φ = 1131131664.

The previous prime is 1145633407. The next prime is 1145633441. The reversal of 1145633431 is 1343365411.

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 1145633431 - 2¹⁵ = 1145600663 is a prime.

It is a super-4 number, since 4×1145633431⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1145633393 and 1145633402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145633441) 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, 7250766 + ... + 7250923.

It is an arithmetic number, because the mean of its divisors is an integer number (290033800).

Almost surely, 2^1145633431 is an apocalyptic number.

1145633431 is a deficient number, since it is larger than the sum of its proper divisors (14501769).

1145633431 is an equidigital number, since it uses as much as digits as its factorization.

1145633431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14501768.

The product of its digits is 12960, while the sum is 31.

The square root of 1145633431 is about 33847.2071373695. The cubic root of 1145633431 is about 1046.3618397868.

Adding to 1145633431 its reverse (1343365411), we get a palindrome (2488998842).

The spelling of 1145633431 in words is "one billion, one hundred forty-five million, six hundred thirty-three thousand, four hundred thirty-one".