961558 has 16 divisors (see below), whose sum is σ = 1604736. Its totient is φ = 429120.

The previous prime is 961549. The next prime is 961567. The reversal of 961558 is 855169.

961558 is digitally balanced in base 2, because in such base 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 (961549) and next prime (961567).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210 + ... + 1402.

It is an arithmetic number, because the mean of its divisors is an integer number (100296).

2⁹⁶¹⁵⁵⁸ is an apocalyptic number.

961558 is a deficient number, since it is larger than the sum of its proper divisors (643178).

961558 is a wasteful number, since it uses less digits than its factorization.

961558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239.

The product of its digits is 10800, while the sum is 34.

The square root of 961558 is about 980.5906383400. The cubic root of 961558 is about 98.7018202187.

The spelling of 961558 in words is "nine hundred sixty-one thousand, five hundred fifty-eight".