60921 has 12 divisors (see below), whose sum is σ = 100672. Its totient is φ = 34776.

The previous prime is 60919. The next prime is 60923. The reversal of 60921 is 12906.

It is an interprime number because it is at equal distance from previous prime (60919) and next prime (60923).

It is not a de Polignac number, because 60921 - 2¹ = 60919 is a prime.

It is a super-2 number, since 2×60921² = 7422736482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

60921 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 60894 and 60903.

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 60921.

It is not an unprimeable number, because it can be changed into a prime (60923) 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, 421 + ... + 546.

2⁶⁰⁹²¹ is an apocalyptic number.

It is an amenable number.

60921 is a deficient number, since it is larger than the sum of its proper divisors (39751).

60921 is a wasteful number, since it uses less digits than its factorization.

60921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 60921 is about 246.8217980649. The cubic root of 60921 is about 39.3479708680.

It can be divided in two parts, 609 and 21, that added together give a triangular number (630 = T₃₅).

The spelling of 60921 in words is "sixty thousand, nine hundred twenty-one".