387042561 has 12 divisors (see below), whose sum is σ = 560394900. Its totient is φ = 257412960.

The previous prime is 387042547. The next prime is 387042599. The reversal of 387042561 is 165240783.

It can be written as a sum of positive squares in 2 ways, for example, as 12852225 + 374190336 = 3585^2 + 19344^2 .

It is not a de Polignac number, because 387042561 - 2¹⁰ = 387041537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (387042661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47286 + ... + 54863.

It is an arithmetic number, because the mean of its divisors is an integer number (46699575).

Almost surely, 2^387042561 is an apocalyptic number.

It is an amenable number.

387042561 is a deficient number, since it is larger than the sum of its proper divisors (173352339).

387042561 is a wasteful number, since it uses less digits than its factorization.

387042561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102576 (or 102573 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 387042561 is about 19673.3972917745. The cubic root of 387042561 is about 728.7628768098.

The spelling of 387042561 in words is "three hundred eighty-seven million, forty-two thousand, five hundred sixty-one".