961554 has 32 divisors (see below), whose sum is σ = 2223936. Its totient is φ = 273920.

The previous prime is 961549. The next prime is 961567. The reversal of 961554 is 455169.

It is a Curzon number.

It is a plaindrome in base 13.

It is an unprimeable number.

961554 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 694 + ... + 1550.

It is an arithmetic number, because the mean of its divisors is an integer number (69498).

2⁹⁶¹⁵⁵⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 961554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1111968).

961554 is an abundant number, since it is smaller than the sum of its proper divisors (1262382).

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

961554 is a wasteful number, since it uses less digits than its factorization.

961554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890.

The product of its digits is 5400, while the sum is 30.

The square root of 961554 is about 980.5885987508. The cubic root of 961554 is about 98.7016833548.

It can be divided in two parts, 9615 and 54, that added together give a palindrome (9669).

The spelling of 961554 in words is "nine hundred sixty-one thousand, five hundred fifty-four".