3890121 has 8 divisors (see below), whose sum is σ = 5313504. Its totient is φ = 2530080.

The previous prime is 3890119. The next prime is 3890129. The reversal of 3890121 is 1210983.

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

It is not a de Polignac number, because 3890121 - 2¹ = 3890119 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3890091 and 3890100.

It is not an unprimeable number, because it can be changed into a prime (3890129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15691 + ... + 15936.

It is an arithmetic number, because the mean of its divisors is an integer number (664188).

Almost surely, 2^3890121 is an apocalyptic number.

It is an amenable number.

3890121 is a deficient number, since it is larger than the sum of its proper divisors (1423383).

3890121 is a wasteful number, since it uses less digits than its factorization.

3890121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31671.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 3890121 is about 1972.3389668107. The cubic root of 3890121 is about 157.2730720374.

The spelling of 3890121 in words is "three million, eight hundred ninety thousand, one hundred twenty-one".