121742 has 8 divisors (see below), whose sum is σ = 189000. Its totient is φ = 58744.

The previous prime is 121727. The next prime is 121763. The reversal of 121742 is 247121.

121742 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

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

It is a super-2 number, since 2×121742² = 29642229128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121742.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 992 + ... + 1107.

It is an arithmetic number, because the mean of its divisors is an integer number (23625).

2¹²¹⁷⁴² is an apocalyptic number.

121742 is a deficient number, since it is larger than the sum of its proper divisors (67258).

121742 is a wasteful number, since it uses less digits than its factorization.

121742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130.

The product of its digits is 112, while the sum is 17.

The square root of 121742 is about 348.9154625407. The cubic root of 121742 is about 49.5617703162.

Adding to 121742 its reverse (247121), we get a palindrome (368863).

The spelling of 121742 in words is "one hundred twenty-one thousand, seven hundred forty-two", and thus it is an iban number.