121149542 has 4 divisors (see below), whose sum is σ = 181724316. Its totient is φ = 60574770.

The previous prime is 121149517. The next prime is 121149563. The reversal of 121149542 is 245941121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245941121 = 67 ⋅3670763.

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, 30287384 + ... + 30287387.

It is an arithmetic number, because the mean of its divisors is an integer number (45431079).

Almost surely, 2^121149542 is an apocalyptic number.

121149542 is a deficient number, since it is larger than the sum of its proper divisors (60574774).

121149542 is an equidigital number, since it uses as much as digits as its factorization.

121149542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60574773.

The product of its digits is 2880, while the sum is 29.

The square root of 121149542 is about 11006.7952647444. The cubic root of 121149542 is about 494.8124201682.

The spelling of 121149542 in words is "one hundred twenty-one million, one hundred forty-nine thousand, five hundred forty-two".