152404421 has 8 divisors (see below), whose sum is σ = 168131544. Its totient is φ = 137249280.

The previous prime is 152404403. The next prime is 152404423. The reversal of 152404421 is 124404251.

It can be written as a sum of positive squares in 4 ways, for example, as 25391521 + 127012900 = 5039^2 + 11270^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152404421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152404423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142436 + ... + 143501.

It is an arithmetic number, because the mean of its divisors is an integer number (21016443).

Almost surely, 2^152404421 is an apocalyptic number.

It is an amenable number.

152404421 is a deficient number, since it is larger than the sum of its proper divisors (15727123).

152404421 is a wasteful number, since it uses less digits than its factorization.

152404421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285991.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 152404421 is about 12345.2185480857. The cubic root of 152404421 is about 534.1532253511.

Adding to 152404421 its reverse (124404251), we get a palindrome (276808672).

The spelling of 152404421 in words is "one hundred fifty-two million, four hundred four thousand, four hundred twenty-one".