1023005421 has 24 divisors (see below), whose sum is σ = 1531503480. Its totient is φ = 657248256.

The previous prime is 1023005419. The next prime is 1023005443. The reversal of 1023005421 is 1245003201.

1023005421 is a `hidden beast` number, since 10 + 230 + 0 + 5 + 421 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 258759396 + 764246025 = 16086^2 + 27645^2 .

It is not a de Polignac number, because 1023005421 - 2¹ = 1023005419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1023005394 and 1023005403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023005411) 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, 147201 + ... + 153993.

It is an arithmetic number, because the mean of its divisors is an integer number (63812645).

Almost surely, 2^1023005421 is an apocalyptic number.

It is an amenable number.

1023005421 is a deficient number, since it is larger than the sum of its proper divisors (508498059).

1023005421 is a wasteful number, since it uses less digits than its factorization.

1023005421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7405 (or 7402 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1023005421 is about 31984.4559278409. The cubic root of 1023005421 is about 1007.6104084230.

Adding to 1023005421 its reverse (1245003201), we get a palindrome (2268008622).

The spelling of 1023005421 in words is "one billion, twenty-three million, five thousand, four hundred twenty-one".