154921956 has 48 divisors (see below), whose sum is σ = 419306496. Its totient is φ = 43601184.

The previous prime is 154921937. The next prime is 154921957. The reversal of 154921956 is 659129451.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (154921957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8136 + ... + 19391.

It is an arithmetic number, because the mean of its divisors is an integer number (8735552).

Almost surely, 2^154921956 is an apocalyptic number.

It is an amenable number.

154921956 is an abundant number, since it is smaller than the sum of its proper divisors (264384540).

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

154921956 is a wasteful number, since it uses less digits than its factorization.

154921956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27608 (or 27606 counting only the distinct ones).

The product of its digits is 97200, while the sum is 42.

The square root of 154921956 is about 12446.7648808837. The cubic root of 154921956 is about 537.0783638400.

The spelling of 154921956 in words is "one hundred fifty-four million, nine hundred twenty-one thousand, nine hundred fifty-six".