428142561 has 32 divisors (see below), whose sum is σ = 749184000. Its totient is φ = 210703680.

The previous prime is 428142553. The next prime is 428142563. The reversal of 428142561 is 165241824.

It is a happy number.

It is not a de Polignac number, because 428142561 - 2³ = 428142553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (428142563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44386 + ... + 53163.

It is an arithmetic number, because the mean of its divisors is an integer number (23412000).

Almost surely, 2^428142561 is an apocalyptic number.

It is an amenable number.

428142561 is a deficient number, since it is larger than the sum of its proper divisors (321041439).

428142561 is a wasteful number, since it uses less digits than its factorization.

428142561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97589.

The product of its digits is 15360, while the sum is 33.

The square root of 428142561 is about 20691.6060517303. The cubic root of 428142561 is about 753.6958677218.

The spelling of 428142561 in words is "four hundred twenty-eight million, one hundred forty-two thousand, five hundred sixty-one".