1378541 has 2 divisors, whose sum is σ = 1378542. Its totient is φ = 1378540.

The previous prime is 1378529. The next prime is 1378561. The reversal of 1378541 is 1458731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1357225 + 21316 = 1165^2 + 146^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378541 - 2¹⁰ = 1377517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689270 + 689271.

It is an arithmetic number, because the mean of its divisors is an integer number (689271).

2^1378541 is an apocalyptic number.

It is an amenable number.

1378541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378541 is an equidigital number, since it uses as much as digits as its factorization.

1378541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 29.

The square root of 1378541 is about 1174.1128565858. The cubic root of 1378541 is about 111.2943786250.

The spelling of 1378541 in words is "one million, three hundred seventy-eight thousand, five hundred forty-one".