121420542 has 16 divisors (see below), whose sum is σ = 253399680. Its totient is φ = 38713752.

The previous prime is 121420501. The next prime is 121420553. The reversal of 121420542 is 245024121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439792 + ... + 440067.

It is an arithmetic number, because the mean of its divisors is an integer number (15837480).

Almost surely, 2^121420542 is an apocalyptic number.

121420542 is an abundant number, since it is smaller than the sum of its proper divisors (131979138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121420542 is a wasteful number, since it uses less digits than its factorization.

121420542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879887.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 121420542 is about 11019.0989649789. The cubic root of 121420542 is about 495.1810948447.

Adding to 121420542 its reverse (245024121), we get a palindrome (366444663).

The spelling of 121420542 in words is "one hundred twenty-one million, four hundred twenty thousand, five hundred forty-two".