155242004 has 12 divisors (see below), whose sum is σ = 271893300. Its totient is φ = 77558208.

The previous prime is 155241991. The next prime is 155242007. The reversal of 155242004 is 400242551.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 92198404 + 63043600 = 9602^2 + 7940^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155242007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9899 + ... + 20210.

It is an arithmetic number, because the mean of its divisors is an integer number (22657775).

Almost surely, 2^155242004 is an apocalyptic number.

It is an amenable number.

155242004 is a deficient number, since it is larger than the sum of its proper divisors (116651296).

155242004 is a wasteful number, since it uses less digits than its factorization.

155242004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31402 (or 31400 counting only the distinct ones).

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

The square root of 155242004 is about 12459.6149218184. The cubic root of 155242004 is about 537.4479534245.

Adding to 155242004 its reverse (400242551), we get a palindrome (555484555).

The spelling of 155242004 in words is "one hundred fifty-five million, two hundred forty-two thousand, four".