421245243 has 12 divisors (see below), whose sum is σ = 622616280. Its totient is φ = 274298976.

The previous prime is 421245211. The next prime is 421245263. The reversal of 421245243 is 342542124.

It is not a de Polignac number, because 421245243 - 2⁵ = 421245211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421245263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 543858 + ... + 544631.

It is an arithmetic number, because the mean of its divisors is an integer number (51884690).

Almost surely, 2^421245243 is an apocalyptic number.

421245243 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

421245243 is a deficient number, since it is larger than the sum of its proper divisors (201371037).

421245243 is a wasteful number, since it uses less digits than its factorization.

421245243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088538 (or 1088535 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 421245243 is about 20524.2598648526. The cubic root of 421245243 is about 749.6266248188.

Adding to 421245243 its reverse (342542124), we get a palindrome (763787367).

It can be divided in two parts, 4212 and 45243, that added together give a triangular number (49455 = T₃₁₄).

The spelling of 421245243 in words is "four hundred twenty-one million, two hundred forty-five thousand, two hundred forty-three".