1020342421 has 8 divisors (see below), whose sum is σ = 1166346944. Its totient is φ = 874398240.

The previous prime is 1020342419. The next prime is 1020342439. The reversal of 1020342421 is 1242430201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020342421 - 2¹ = 1020342419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020342481) 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, 30241 + ... + 54361.

It is an arithmetic number, because the mean of its divisors is an integer number (145793368).

Almost surely, 2^1020342421 is an apocalyptic number.

It is an amenable number.

1020342421 is a deficient number, since it is larger than the sum of its proper divisors (146004523).

1020342421 is an equidigital number, since it uses as much as digits as its factorization.

1020342421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30171.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1020342421 is about 31942.7992042025. The cubic root of 1020342421 is about 1006.7353403413.

Adding to 1020342421 its reverse (1242430201), we get a palindrome (2262772622).

The spelling of 1020342421 in words is "one billion, twenty million, three hundred forty-two thousand, four hundred twenty-one".