1421242164 has 18 divisors (see below), whose sum is σ = 3592584450. Its totient is φ = 473747376.

The previous prime is 1421242103. The next prime is 1421242189. The reversal of 1421242164 is 4612421241.

1421242164 is a `hidden beast` number, since 1 + 421 + 24 + 216 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1071252900 + 349989264 = 32730^2 + 18708^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19739439 + ... + 19739510.

It is an arithmetic number, because the mean of its divisors is an integer number (199588025).

Almost surely, 2^1421242164 is an apocalyptic number.

It is an amenable number.

1421242164 is an abundant number, since it is smaller than the sum of its proper divisors (2171342286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421242164 is a wasteful number, since it uses less digits than its factorization.

1421242164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39478959 (or 39478954 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 1421242164 is about 37699.3655649535. The cubic root of 1421242164 is about 1124.3185111111.

The spelling of 1421242164 in words is "one billion, four hundred twenty-one million, two hundred forty-two thousand, one hundred sixty-four".