420044145 has 16 divisors (see below), whose sum is σ = 673807680. Its totient is φ = 223444544.

The previous prime is 420044137. The next prime is 420044161. The reversal of 420044145 is 541440024.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 420044145 - 2³ = 420044137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30159 + ... + 41828.

It is an arithmetic number, because the mean of its divisors is an integer number (42112980).

Almost surely, 2^420044145 is an apocalyptic number.

It is an amenable number.

420044145 is a deficient number, since it is larger than the sum of its proper divisors (253763535).

420044145 is a wasteful number, since it uses less digits than its factorization.

420044145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72384.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 420044145 is about 20494.9785313379. The cubic root of 420044145 is about 748.9134756020.

Adding to 420044145 its reverse (541440024), we get a palindrome (961484169).

The spelling of 420044145 in words is "four hundred twenty million, forty-four thousand, one hundred forty-five".