155129745 has 16 divisors (see below), whose sum is σ = 251609472. Its totient is φ = 81601920.

The previous prime is 155129717. The next prime is 155129749. The reversal of 155129745 is 547921551.

It is not a de Polignac number, because 155129745 - 2⁷ = 155129617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155129749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69741 + ... + 71930.

It is an arithmetic number, because the mean of its divisors is an integer number (15725592).

Almost surely, 2^155129745 is an apocalyptic number.

155129745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155129745 is a deficient number, since it is larger than the sum of its proper divisors (96479727).

155129745 is a wasteful number, since it uses less digits than its factorization.

155129745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141752.

The product of its digits is 63000, while the sum is 39.

The square root of 155129745 is about 12455.1091926165. The cubic root of 155129745 is about 537.3183752672.

The spelling of 155129745 in words is "one hundred fifty-five million, one hundred twenty-nine thousand, seven hundred forty-five".