1125143421 has 8 divisors (see below), whose sum is σ = 1551922080. Its totient is φ = 724230192.

The previous prime is 1125143401. The next prime is 1125143441. The reversal of 1125143421 is 1243415211.

It is an interprime number because it is at equal distance from previous prime (1125143401) and next prime (1125143441).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1125143421 - 2¹⁰ = 1125142397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1125143391 and 1125143400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125143401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6466255 + ... + 6466428.

It is an arithmetic number, because the mean of its divisors is an integer number (193990260).

Almost surely, 2^1125143421 is an apocalyptic number.

It is an amenable number.

1125143421 is a deficient number, since it is larger than the sum of its proper divisors (426778659).

1125143421 is a wasteful number, since it uses less digits than its factorization.

1125143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12932715.

The product of its digits is 960, while the sum is 24.

The square root of 1125143421 is about 33543.1575883965. The cubic root of 1125143421 is about 1040.0861063445.

Adding to 1125143421 its reverse (1243415211), we get a palindrome (2368558632).

The spelling of 1125143421 in words is "one billion, one hundred twenty-five million, one hundred forty-three thousand, four hundred twenty-one".