155145442 has 8 divisors (see below), whose sum is σ = 242836416. Its totient is φ = 74199972.

The previous prime is 155145433. The next prime is 155145461. The reversal of 155145442 is 244541551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1686318 + ... + 1686409.

It is an arithmetic number, because the mean of its divisors is an integer number (30354552).

Almost surely, 2^155145442 is an apocalyptic number.

155145442 is a deficient number, since it is larger than the sum of its proper divisors (87690974).

155145442 is a wasteful number, since it uses less digits than its factorization.

155145442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3372752.

The product of its digits is 16000, while the sum is 31.

The square root of 155145442 is about 12455.7393196871. The cubic root of 155145442 is about 537.3364977363.

Adding to 155145442 its reverse (244541551), we get a palindrome (399686993).

The spelling of 155145442 in words is "one hundred fifty-five million, one hundred forty-five thousand, four hundred forty-two".