121642 has 4 divisors (see below), whose sum is σ = 182466. Its totient is φ = 60820.

The previous prime is 121637. The next prime is 121661. The reversal of 121642 is 246121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 101761 + 19881 = 319^2 + 141^2 .

It is an unprimeable number.

121642 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 as a sum of consecutive naturals, namely, 30409 + ... + 30412.

2¹²¹⁶⁴² is an apocalyptic number.

121642 is a deficient number, since it is larger than the sum of its proper divisors (60824).

121642 is an equidigital number, since it uses as much as digits as its factorization.

121642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60823.

The product of its digits is 96, while the sum is 16.

The square root of 121642 is about 348.7721319142. The cubic root of 121642 is about 49.5481964341.

Adding to 121642 its reverse (246121), we get a palindrome (367763).

The spelling of 121642 in words is "one hundred twenty-one thousand, six hundred forty-two".