152820405 has 16 divisors (see below), whose sum is σ = 271680960. Its totient is φ = 81504144.

The previous prime is 152820391. The next prime is 152820413. The reversal of 152820405 is 504028251.

It is a happy number.

It is not a de Polignac number, because 152820405 - 2⁴ = 152820389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565867 + ... + 566136.

It is an arithmetic number, because the mean of its divisors is an integer number (16980060).

Almost surely, 2^152820405 is an apocalyptic number.

152820405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

152820405 is a deficient number, since it is larger than the sum of its proper divisors (118860555).

152820405 is a wasteful number, since it uses less digits than its factorization.

152820405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132017 (or 1132011 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 152820405 is about 12362.0550476043. The cubic root of 152820405 is about 534.6387697499.

Adding to 152820405 its reverse (504028251), we get a palindrome (656848656).

The spelling of 152820405 in words is "one hundred fifty-two million, eight hundred twenty thousand, four hundred five".