155442134 has 4 divisors (see below), whose sum is σ = 233163204. Its totient is φ = 77721066.

The previous prime is 155442127. The next prime is 155442139. The reversal of 155442134 is 431244551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 431244551 = 991 ⋅435161.

It is a junction number, because it is equal to n+sod(n) for n = 155442097 and 155442106.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 38860532 + ... + 38860535.

It is an arithmetic number, because the mean of its divisors is an integer number (58290801).

Almost surely, 2^155442134 is an apocalyptic number.

155442134 is a deficient number, since it is larger than the sum of its proper divisors (77721070).

155442134 is an equidigital number, since it uses as much as digits as its factorization.

155442134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77721069.

The product of its digits is 9600, while the sum is 29.

The square root of 155442134 is about 12467.6434822303. The cubic root of 155442134 is about 537.6788043308.

Adding to 155442134 its reverse (431244551), we get a palindrome (586686685).

The spelling of 155442134 in words is "one hundred fifty-five million, four hundred forty-two thousand, one hundred thirty-four".