16121754 has 80 divisors (see below), whose sum is σ = 40249440. Its totient is φ = 4782240.

The previous prime is 16121753. The next prime is 16121759. The reversal of 16121754 is 45712161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16121753) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 147852 + ... + 147960.

It is an arithmetic number, because the mean of its divisors is an integer number (503118).

Almost surely, 2^16121754 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16121754, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20124720).

16121754 is an abundant number, since it is smaller than the sum of its proper divisors (24127686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16121754 is a wasteful number, since it uses less digits than its factorization.

16121754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 208 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 16121754 is about 4015.1904064440. The cubic root of 16121754 is about 252.6217639690.

The spelling of 16121754 in words is "sixteen million, one hundred twenty-one thousand, seven hundred fifty-four".