121849142 has 4 divisors (see below), whose sum is σ = 182773716. Its totient is φ = 60924570.

The previous prime is 121849087. The next prime is 121849151. The reversal of 121849142 is 241948121.

It is a happy number.

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

It is a super-2 number, since 2×121849142² = 29694426812272328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121849099 and 121849108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30462284 + ... + 30462287.

It is an arithmetic number, because the mean of its divisors is an integer number (45693429).

Almost surely, 2^121849142 is an apocalyptic number.

121849142 is a deficient number, since it is larger than the sum of its proper divisors (60924574).

121849142 is an equidigital number, since it uses as much as digits as its factorization.

121849142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60924573.

The product of its digits is 4608, while the sum is 32.

The square root of 121849142 is about 11038.5298840018. The cubic root of 121849142 is about 495.7630539909.

The spelling of 121849142 in words is "one hundred twenty-one million, eight hundred forty-nine thousand, one hundred forty-two".