1125420143 has 4 divisors (see below), whose sum is σ = 1125640680. Its totient is φ = 1125199608.

The previous prime is 1125420133. The next prime is 1125420161. The reversal of 1125420143 is 3410245211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3410245211 = 1621 ⋅2103791.

It is a cyclic number.

It is not a de Polignac number, because 1125420143 - 2⁸ = 1125419887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125420133) 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, 102428 + ... + 112881.

It is an arithmetic number, because the mean of its divisors is an integer number (281410170).

Almost surely, 2^1125420143 is an apocalyptic number.

1125420143 is a deficient number, since it is larger than the sum of its proper divisors (220537).

1125420143 is an equidigital number, since it uses as much as digits as its factorization.

1125420143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220536.

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

The square root of 1125420143 is about 33547.2821999041. The cubic root of 1125420143 is about 1040.1713669166.

Adding to 1125420143 its reverse (3410245211), we get a palindrome (4535665354).

The spelling of 1125420143 in words is "one billion, one hundred twenty-five million, four hundred twenty thousand, one hundred forty-three".