155140042 has 16 divisors (see below), whose sum is σ = 237968640. Its totient is φ = 75836592.

The previous prime is 155139989. The next prime is 155140043. The reversal of 155140042 is 240041551.

It is a junction number, because it is equal to n+sod(n) for n = 155139995 and 155140022.

It is not an unprimeable number, because it can be changed into a prime (155140043) 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, 11508 + ... + 21040.

It is an arithmetic number, because the mean of its divisors is an integer number (14873040).

Almost surely, 2^155140042 is an apocalyptic number.

155140042 is a deficient number, since it is larger than the sum of its proper divisors (82828598).

155140042 is a wasteful number, since it uses less digits than its factorization.

155140042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9717.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 155140042 is about 12455.5225502586. The cubic root of 155140042 is about 537.3302634770.

Adding to 155140042 its reverse (240041551), we get a palindrome (395181593).

The spelling of 155140042 in words is "one hundred fifty-five million, one hundred forty thousand, forty-two".