155420949 has 16 divisors (see below), whose sum is σ = 215613440. Its totient is φ = 99474480.

The previous prime is 155420929. The next prime is 155420981. The reversal of 155420949 is 949024551.

It is not a de Polignac number, because 155420949 - 2¹² = 155416853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155420929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5232 + ... + 18390.

It is an arithmetic number, because the mean of its divisors is an integer number (13475840).

Almost surely, 2^155420949 is an apocalyptic number.

It is an amenable number.

155420949 is a deficient number, since it is larger than the sum of its proper divisors (60192491).

155420949 is a wasteful number, since it uses less digits than its factorization.

155420949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13320.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 155420949 is about 12466.7938540749. The cubic root of 155420949 is about 537.6543767133.

The spelling of 155420949 in words is "one hundred fifty-five million, four hundred twenty thousand, nine hundred forty-nine".