1145431 has 4 divisors (see below), whose sum is σ = 1309072. Its totient is φ = 981792.

The previous prime is 1145429. The next prime is 1145461. The reversal of 1145431 is 1345411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1345411 = 373 ⋅3607.

It is not a de Polignac number, because 1145431 - 2¹ = 1145429 is a prime.

It is a super-2 number, since 2×1145431² = 2624024351522, 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 = 1145399 and 1145408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145411) 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, 81810 + ... + 81823.

It is an arithmetic number, because the mean of its divisors is an integer number (327268).

2^1145431 is an apocalyptic number.

1145431 is a deficient number, since it is larger than the sum of its proper divisors (163641).

1145431 is an equidigital number, since it uses as much as digits as its factorization.

1145431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163640.

The product of its digits is 240, while the sum is 19.

The square root of 1145431 is about 1070.2481020773. The cubic root of 1145431 is about 104.6300206183.

The spelling of 1145431 in words is "one million, one hundred forty-five thousand, four hundred thirty-one".