1012423421 has 4 divisors (see below), whose sum is σ = 1029583200. Its totient is φ = 995263644.

The previous prime is 1012423409. The next prime is 1012423429. The reversal of 1012423421 is 1243242101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1243242101 = 43 ⋅28912607.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012423421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1012423393 and 1012423402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012423429) 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, 8579801 + ... + 8579918.

It is an arithmetic number, because the mean of its divisors is an integer number (257395800).

Almost surely, 2^1012423421 is an apocalyptic number.

It is an amenable number.

1012423421 is a deficient number, since it is larger than the sum of its proper divisors (17159779).

1012423421 is an equidigital number, since it uses as much as digits as its factorization.

1012423421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17159778.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1012423421 is about 31818.6018077476. The cubic root of 1012423421 is about 1004.1241086796.

Adding to 1012423421 its reverse (1243242101), we get a palindrome (2255665522).

The spelling of 1012423421 in words is "one billion, twelve million, four hundred twenty-three thousand, four hundred twenty-one".