61541587 has 2 divisors, whose sum is σ = 61541588. Its totient is φ = 61541586.

The previous prime is 61541563. The next prime is 61541611. The reversal of 61541587 is 78514516.

It is a balanced prime because it is at equal distance from previous prime (61541563) and next prime (61541611).

It is a cyclic number.

It is not a de Polignac number, because 61541587 - 2¹¹ = 61539539 is a prime.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (61541387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30770793 + 30770794.

It is an arithmetic number, because the mean of its divisors is an integer number (30770794).

Almost surely, 2^61541587 is an apocalyptic number.

61541587 is a deficient number, since it is larger than the sum of its proper divisors (1).

61541587 is an equidigital number, since it uses as much as digits as its factorization.

61541587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 37.

The square root of 61541587 is about 7844.8446128652. The cubic root of 61541587 is about 394.8112905141.

It can be divided in two parts, 61541 and 587, that added together give a triangular number (62128 = T₃₅₂).

The spelling of 61541587 in words is "sixty-one million, five hundred forty-one thousand, five hundred eighty-seven".