961421 has 4 divisors (see below), whose sum is σ = 977244. Its totient is φ = 945600.

The previous prime is 961399. The next prime is 961427. The reversal of 961421 is 124169.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124169 = 227 ⋅547.

It can be written as a sum of positive squares in 2 ways, for example, as 264196 + 697225 = 514^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 961421 - 2¹⁴ = 945037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 961421.

It is not an unprimeable number, because it can be changed into a prime (961427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7820 + ... + 7941.

It is an arithmetic number, because the mean of its divisors is an integer number (244311).

2⁹⁶¹⁴²¹ is an apocalyptic number.

It is an amenable number.

961421 is a deficient number, since it is larger than the sum of its proper divisors (15823).

961421 is a wasteful number, since it uses less digits than its factorization.

961421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15822.

The product of its digits is 432, while the sum is 23.

The square root of 961421 is about 980.5207799940. The cubic root of 961421 is about 98.6971324129.

The spelling of 961421 in words is "nine hundred sixty-one thousand, four hundred twenty-one".