15954121 has 8 divisors (see below), whose sum is σ = 16174080. Its totient is φ = 15735888.

The previous prime is 15954101. The next prime is 15954137. The reversal of 15954121 is 12145951.

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 15954121 - 2¹⁹ = 15429833 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 15954121.

It is not an unprimeable number, because it can be changed into a prime (15954101) 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, 33930 + ... + 34396.

It is an arithmetic number, because the mean of its divisors is an integer number (2021760).

Almost surely, 2^15954121 is an apocalyptic number.

It is an amenable number.

15954121 is a deficient number, since it is larger than the sum of its proper divisors (219959).

15954121 is a wasteful number, since it uses less digits than its factorization.

15954121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863.

The product of its digits is 1800, while the sum is 28.

The square root of 15954121 is about 3994.2610079963. The cubic root of 15954121 is about 251.7431297467.

The spelling of 15954121 in words is "fifteen million, nine hundred fifty-four thousand, one hundred twenty-one".