154857249 has 6 divisors (see below), whose sum is σ = 223682706. Its totient is φ = 103238160.

The previous prime is 154857191. The next prime is 154857253. The reversal of 154857249 is 942758451.

It can be written as a sum of positive squares in only one way, i.e., 139996224 + 14861025 = 11832^2 + 3855^2 .

It is not a de Polignac number, because 154857249 - 2¹¹ = 154855201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (154857349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8603172 + ... + 8603189.

It is an arithmetic number, because the mean of its divisors is an integer number (37280451).

Almost surely, 2^154857249 is an apocalyptic number.

It is an amenable number.

154857249 is a deficient number, since it is larger than the sum of its proper divisors (68825457).

154857249 is a wasteful number, since it uses less digits than its factorization.

154857249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17206367 (or 17206364 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 154857249 is about 12444.1652592691. The cubic root of 154857249 is about 537.0035787242.

The spelling of 154857249 in words is "one hundred fifty-four million, eight hundred fifty-seven thousand, two hundred forty-nine".