155442130 has 16 divisors (see below), whose sum is σ = 279937944. Its totient is φ = 62145280.

The previous prime is 155442127. The next prime is 155442139. The reversal of 155442130 is 31244551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 135559449 + 19882681 = 11643^2 + 4459^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155442095 and 155442104.

It is not an unprimeable number, because it can be changed into a prime (155442139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35544 + ... + 39676.

Almost surely, 2^155442130 is an apocalyptic number.

155442130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155442130 is a deficient number, since it is larger than the sum of its proper divisors (124495814).

155442130 is a wasteful number, since it uses less digits than its factorization.

155442130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7901.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 155442130 is about 12467.6433218151. The cubic root of 155442130 is about 537.6787997187.

Adding to 155442130 its reverse (31244551), we get a palindrome (186686681).

The spelling of 155442130 in words is "one hundred fifty-five million, four hundred forty-two thousand, one hundred thirty".