2154541 has 2 divisors, whose sum is σ = 2154542. Its totient is φ = 2154540.

The previous prime is 2154539. The next prime is 2154553. The reversal of 2154541 is 1454512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1768900 + 385641 = 1330^2 + 621^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154541 - 2¹ = 2154539 is a prime.

Together with 2154539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077270 + 1077271.

It is an arithmetic number, because the mean of its divisors is an integer number (1077271).

2^2154541 is an apocalyptic number.

It is an amenable number.

2154541 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154541 is an equidigital number, since it uses as much as digits as its factorization.

2154541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 800, while the sum is 22.

The square root of 2154541 is about 1467.8354812444. The cubic root of 2154541 is about 129.1570908383.

The spelling of 2154541 in words is "two million, one hundred fifty-four thousand, five hundred forty-one".