16261541 has 2 divisors, whose sum is σ = 16261542. Its totient is φ = 16261540.

The previous prime is 16261523. The next prime is 16261561. The reversal of 16261541 is 14516261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14984641 + 1276900 = 3871^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 16261541 - 2⁶ = 16261477 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16261541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16261561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8130770 + 8130771.

It is an arithmetic number, because the mean of its divisors is an integer number (8130771).

Almost surely, 2^16261541 is an apocalyptic number.

It is an amenable number.

16261541 is a deficient number, since it is larger than the sum of its proper divisors (1).

16261541 is an equidigital number, since it uses as much as digits as its factorization.

16261541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 16261541 is about 4032.5601049457. The cubic root of 16261541 is about 253.3498002146.

The spelling of 16261541 in words is "sixteen million, two hundred sixty-one thousand, five hundred forty-one".