421442371 has 4 divisors (see below), whose sum is σ = 481648432. Its totient is φ = 361236312.

The previous prime is 421442341. The next prime is 421442383. The reversal of 421442371 is 173244124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421442371 - 2¹³ = 421434179 is a prime.

It is a super-2 number, since 2×421442371² = 355227344148203282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421442311) 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, 30103020 + ... + 30103033.

It is an arithmetic number, because the mean of its divisors is an integer number (120412108).

Almost surely, 2^421442371 is an apocalyptic number.

421442371 is a deficient number, since it is larger than the sum of its proper divisors (60206061).

421442371 is an equidigital number, since it uses as much as digits as its factorization.

421442371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60206060.

The product of its digits is 5376, while the sum is 28.

The square root of 421442371 is about 20529.0616200546. The cubic root of 421442371 is about 749.7435395733.

Adding to 421442371 its reverse (173244124), we get a palindrome (594686495).

The spelling of 421442371 in words is "four hundred twenty-one million, four hundred forty-two thousand, three hundred seventy-one".