154242251 has 8 divisors (see below), whose sum is σ = 157528800. Its totient is φ = 150990400.

The previous prime is 154242229. The next prime is 154242259. The reversal of 154242251 is 152242451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154242251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154242251.

It is not an unprimeable number, because it can be changed into a prime (154242259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410 + ... + 17568.

It is an arithmetic number, because the mean of its divisors is an integer number (19691100).

Almost surely, 2^154242251 is an apocalyptic number.

154242251 is a deficient number, since it is larger than the sum of its proper divisors (3286549).

154242251 is a wasteful number, since it uses less digits than its factorization.

154242251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17349.

The product of its digits is 3200, while the sum is 26.

The square root of 154242251 is about 12419.4303814628. The cubic root of 154242251 is about 536.2917526440.

The spelling of 154242251 in words is "one hundred fifty-four million, two hundred forty-two thousand, two hundred fifty-one".