154226421 has 6 divisors (see below), whose sum is σ = 222771510. Its totient is φ = 102817608.

The previous prime is 154226419. The next prime is 154226447. The reversal of 154226421 is 124622451.

154226421 is a `hidden beast` number, since 15 + 4 + 2 + 2 + 642 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 154107396 + 119025 = 12414^2 + 345^2 .

It is not a de Polignac number, because 154226421 - 2¹ = 154226419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154226521) 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, 8568126 + ... + 8568143.

It is an arithmetic number, because the mean of its divisors is an integer number (37128585).

Almost surely, 2^154226421 is an apocalyptic number.

It is an amenable number.

154226421 is a deficient number, since it is larger than the sum of its proper divisors (68545089).

154226421 is a wasteful number, since it uses less digits than its factorization.

154226421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17136275 (or 17136272 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 154226421 is about 12418.7930572983. The cubic root of 154226421 is about 536.2734053390.

Adding to 154226421 its reverse (124622451), we get a palindrome (278848872).

The spelling of 154226421 in words is "one hundred fifty-four million, two hundred twenty-six thousand, four hundred twenty-one".