154402021 has 8 divisors (see below), whose sum is σ = 155675520. Its totient is φ = 153133008.

The previous prime is 154401991. The next prime is 154402051. The reversal of 154402021 is 120204451.

It is an interprime number because it is at equal distance from previous prime (154401991) and next prime (154402051).

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

It is a cyclic number.

It is not a de Polignac number, because 154402021 - 2⁷ = 154401893 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 154402021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154402051) 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 7 ways as a sum of consecutive naturals, for example, 107335 + ... + 108763.

It is an arithmetic number, because the mean of its divisors is an integer number (19459440).

Almost surely, 2^154402021 is an apocalyptic number.

It is an amenable number.

154402021 is a deficient number, since it is larger than the sum of its proper divisors (1273499).

154402021 is a wasteful number, since it uses less digits than its factorization.

154402021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 154402021 is about 12425.8609762060. The cubic root of 154402021 is about 536.4768592217.

Adding to 154402021 its reverse (120204451), we get a palindrome (274606472).

The spelling of 154402021 in words is "one hundred fifty-four million, four hundred two thousand, twenty-one".