420321145 has 16 divisors (see below), whose sum is σ = 511489728. Its totient is φ = 331551040.

The previous prime is 420321137. The next prime is 420321151. The reversal of 420321145 is 541123024.

It is not a de Polignac number, because 420321145 - 2³ = 420321137 is a prime.

It is a super-2 number, since 2×420321145² = 353339729868222050, which contains 22 as substring.

It is a Duffinian number.

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, 119715 + ... + 123175.

It is an arithmetic number, because the mean of its divisors is an integer number (31968108).

Almost surely, 2^420321145 is an apocalyptic number.

It is an amenable number.

420321145 is a deficient number, since it is larger than the sum of its proper divisors (91168583).

420321145 is a wasteful number, since it uses less digits than its factorization.

420321145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 420321145 is about 20501.7351704679. The cubic root of 420321145 is about 749.0780642139.

Adding to 420321145 its reverse (541123024), we get a palindrome (961444169).

The spelling of 420321145 in words is "four hundred twenty million, three hundred twenty-one thousand, one hundred forty-five".