155121234 has 8 divisors (see below), whose sum is σ = 310242480. Its totient is φ = 51707076.

The previous prime is 155121227. The next prime is 155121251. The reversal of 155121234 is 432121551.

It is a happy number.

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

155121234 is an admirable number.

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, 12926764 + ... + 12926775.

It is an arithmetic number, because the mean of its divisors is an integer number (38780310).

Almost surely, 2^155121234 is an apocalyptic number.

155121234 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155121234 is a wasteful number, since it uses less digits than its factorization.

155121234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25853544.

The product of its digits is 1200, while the sum is 24.

The square root of 155121234 is about 12454.7675209134. The cubic root of 155121234 is about 537.3085486532.

Adding to 155121234 its reverse (432121551), we get a palindrome (587242785).

The spelling of 155121234 in words is "one hundred fifty-five million, one hundred twenty-one thousand, two hundred thirty-four".