424240661 has 16 divisors (see below), whose sum is σ = 489207600. Its totient is φ = 364412928.

The previous prime is 424240657. The next prime is 424240667. The reversal of 424240661 is 166042424.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 106296100 + 317944561 = 10310^2 + 17831^2 .

It is a cyclic number.

It is not a de Polignac number, because 424240661 - 2² = 424240657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424240667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8885 + ... + 30453.

It is an arithmetic number, because the mean of its divisors is an integer number (30575475).

Almost surely, 2^424240661 is an apocalyptic number.

It is an amenable number.

424240661 is a deficient number, since it is larger than the sum of its proper divisors (64966939).

424240661 is a wasteful number, since it uses less digits than its factorization.

424240661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21688.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 424240661 is about 20597.1032186567. The cubic root of 424240661 is about 751.3992609866.

The spelling of 424240661 in words is "four hundred twenty-four million, two hundred forty thousand, six hundred sixty-one".