420323145 has 64 divisors (see below), whose sum is σ = 761045760. Its totient is φ = 197936640.

The previous prime is 420323143. The next prime is 420323153. The reversal of 420323145 is 541323024.

It is not a de Polignac number, because 420323145 - 2¹ = 420323143 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420323143) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 738421 + ... + 738989.

It is an arithmetic number, because the mean of its divisors is an integer number (11891340).

Almost surely, 2^420323145 is an apocalyptic number.

It is an amenable number.

420323145 is a deficient number, since it is larger than the sum of its proper divisors (340722615).

420323145 is a wasteful number, since it uses less digits than its factorization.

420323145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 625 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 420323145 is about 20501.7839467691. The cubic root of 420323145 is about 749.0792523164.

Adding to 420323145 its reverse (541323024), we get a palindrome (961646169).

The spelling of 420323145 in words is "four hundred twenty million, three hundred twenty-three thousand, one hundred forty-five".