1043120421 has 24 divisors (see below), whose sum is σ = 1723138560. Its totient is φ = 595666656.

The previous prime is 1043120411. The next prime is 1043120431. The reversal of 1043120421 is 1240213401.

1043120421 is a `hidden beast` number, since 10 + 431 + 204 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (1043120411) and next prime (1043120431).

It is not a de Polignac number, because 1043120421 - 2¹⁸ = 1042858277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1043120394 and 1043120403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043120411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106111 + ... + 115523.

It is an arithmetic number, because the mean of its divisors is an integer number (71797440).

Almost surely, 2^1043120421 is an apocalyptic number.

It is an amenable number.

1043120421 is a deficient number, since it is larger than the sum of its proper divisors (680018139).

1043120421 is a wasteful number, since it uses less digits than its factorization.

1043120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11185 (or 11182 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1043120421 is about 32297.3748314008. The cubic root of 1043120421 is about 1014.1716881886.

Adding to 1043120421 its reverse (1240213401), we get a palindrome (2283333822).

The spelling of 1043120421 in words is "one billion, forty-three million, one hundred twenty thousand, four hundred twenty-one".