155121126 has 16 divisors (see below), whose sum is σ = 313729200. Its totient is φ = 51125888.

The previous prime is 155121121. The next prime is 155121133. The reversal of 155121126 is 621121551.

It is a junction number, because it is equal to n+sod(n) for n = 155121096 and 155121105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155121121) 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, 144711 + ... + 145778.

It is an arithmetic number, because the mean of its divisors is an integer number (19608075).

Almost surely, 2^155121126 is an apocalyptic number.

155121126 is an abundant number, since it is smaller than the sum of its proper divisors (158608074).

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

155121126 is a wasteful number, since it uses less digits than its factorization.

155121126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290583.

The product of its digits is 600, while the sum is 24.

The square root of 155121126 is about 12454.7631852236. The cubic root of 155121126 is about 537.3084239565.

Adding to 155121126 its reverse (621121551), we get a palindrome (776242677).

The spelling of 155121126 in words is "one hundred fifty-five million, one hundred twenty-one thousand, one hundred twenty-six".