123561487 has 12 divisors (see below), whose sum is σ = 143915880. Its totient is φ = 105776496.

The previous prime is 123561461. The next prime is 123561509. The reversal of 123561487 is 784165321.

It is a de Polignac number, because none of the positive numbers 2^k-123561487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123561437) 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, 76573 + ... + 78169.

It is an arithmetic number, because the mean of its divisors is an integer number (11992990).

Almost surely, 2^123561487 is an apocalyptic number.

123561487 is a deficient number, since it is larger than the sum of its proper divisors (20354393).

123561487 is a wasteful number, since it uses less digits than its factorization.

123561487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190 (or 3183 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 123561487 is about 11115.8214721180. The cubic root of 123561487 is about 498.0745776818.

The spelling of 123561487 in words is "one hundred twenty-three million, five hundred sixty-one thousand, four hundred eighty-seven".