961651 has 8 divisors (see below), whose sum is σ = 1009664. Its totient is φ = 914760.

The previous prime is 961643. The next prime is 961657. The reversal of 961651 is 156169.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 961651 - 2³ = 961643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1846 + ... + 2308.

It is an arithmetic number, because the mean of its divisors is an integer number (126208).

2⁹⁶¹⁶⁵¹ is an apocalyptic number.

961651 is a deficient number, since it is larger than the sum of its proper divisors (48013).

961651 is a wasteful number, since it uses less digits than its factorization.

961651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561.

The product of its digits is 1620, while the sum is 28.

The square root of 961651 is about 980.6380575931. The cubic root of 961651 is about 98.7050021981.

The spelling of 961651 in words is "nine hundred sixty-one thousand, six hundred fifty-one".