420725243 has 4 divisors (see below), whose sum is σ = 435233040. Its totient is φ = 406217448.

The previous prime is 420725213. The next prime is 420725251. The reversal of 420725243 is 342527024.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420725243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 14507767 = 420725243 / (4 + 2 + 0 + 7 + 2 + 5 + 2 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420725213) 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, 7253855 + ... + 7253912.

It is an arithmetic number, because the mean of its divisors is an integer number (108808260).

Almost surely, 2^420725243 is an apocalyptic number.

420725243 is a deficient number, since it is larger than the sum of its proper divisors (14507797).

420725243 is a wasteful number, since it uses less digits than its factorization.

420725243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14507796.

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 420725243 is about 20511.5880175085. The cubic root of 420725243 is about 749.3180426186.

The spelling of 420725243 in words is "four hundred twenty million, seven hundred twenty-five thousand, two hundred forty-three".