9561906 has 24 divisors (see below), whose sum is σ = 20850960. Its totient is φ = 3166776.

The previous prime is 9561901. The next prime is 9561911. The reversal of 9561906 is 6091659.

9561906 is a `hidden beast` number, since 9 + 561 + 90 + 6 = 666.

9561906 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9561901) and next prime (9561911).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9561901) 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, 1305 + ... + 4563.

It is an arithmetic number, because the mean of its divisors is an integer number (868790).

Almost surely, 2^9561906 is an apocalyptic number.

9561906 is the 1956-th heptagonal number.

9561906 is an abundant number, since it is smaller than the sum of its proper divisors (11289054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9561906 is a wasteful number, since it uses less digits than its factorization.

9561906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3430 (or 3427 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 9561906 is about 3092.2331736142. The cubic root of 9561906 is about 212.2502237092.

It can be divided in two parts, 95 and 61906, that added together give a square (62001 = 249²).

The spelling of 9561906 in words is "nine million, five hundred sixty-one thousand, nine hundred six".