152420405 has 4 divisors (see below), whose sum is σ = 182904492. Its totient is φ = 121936320.

The previous prime is 152420393. The next prime is 152420407. The reversal of 152420405 is 504024251.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504024251 = 7741 ⋅65111.

It can be written as a sum of positive squares in 2 ways, for example, as 51739249 + 100681156 = 7193^2 + 10034^2 .

It is not a de Polignac number, because 152420405 - 2⁶ = 152420341 is a prime.

It is a super-3 number, since 3×152420405³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152420407) 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 3 ways as a sum of consecutive naturals, for example, 15242036 + ... + 15242045.

It is an arithmetic number, because the mean of its divisors is an integer number (45726123).

Almost surely, 2^152420405 is an apocalyptic number.

It is an amenable number.

152420405 is a deficient number, since it is larger than the sum of its proper divisors (30484087).

152420405 is an equidigital number, since it uses as much as digits as its factorization.

152420405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30484086.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 152420405 is about 12345.8659072582. The cubic root of 152420405 is about 534.1718984898.

Adding to 152420405 its reverse (504024251), we get a palindrome (656444656).

The spelling of 152420405 in words is "one hundred fifty-two million, four hundred twenty thousand, four hundred five".