978541 has 2 divisors, whose sum is σ = 978542. Its totient is φ = 978540.

The previous prime is 978521. The next prime is 978569. The reversal of 978541 is 145879.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 592900 + 385641 = 770^2 + 621^2 .

It is an emirp because it is prime and its reverse (145879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 978541 - 2⁷ = 978413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 978497 and 978506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489270 + 489271.

It is an arithmetic number, because the mean of its divisors is an integer number (489271).

2⁹⁷⁸⁵⁴¹ is an apocalyptic number.

It is an amenable number.

978541 is a deficient number, since it is larger than the sum of its proper divisors (1).

978541 is an equidigital number, since it uses as much as digits as its factorization.

978541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 978541 is about 989.2123129036. The cubic root of 978541 is about 99.2795215748.

The spelling of 978541 in words is "nine hundred seventy-eight thousand, five hundred forty-one".