121432142 has 32 divisors (see below), whose sum is σ = 200727072. Its totient is φ = 54756864.

The previous prime is 121432123. The next prime is 121432147. The reversal of 121432142 is 241234121.

It is a super-2 number, since 2×121432142² = 29491530221416328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121432147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259793 + ... + 260259.

It is an arithmetic number, because the mean of its divisors is an integer number (6272721).

Almost surely, 2^121432142 is an apocalyptic number.

121432142 is a deficient number, since it is larger than the sum of its proper divisors (79294930).

121432142 is a wasteful number, since it uses less digits than its factorization.

121432142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692.

The product of its digits is 384, while the sum is 20.

The square root of 121432142 is about 11019.6253112345. The cubic root of 121432142 is about 495.1968635049.

Adding to 121432142 its reverse (241234121), we get a palindrome (362666263).

The spelling of 121432142 in words is "one hundred twenty-one million, four hundred thirty-two thousand, one hundred forty-two".