121143642 has 32 divisors (see below), whose sum is σ = 250430400. Its totient is φ = 39043200.

The previous prime is 121143641. The next prime is 121143647. The reversal of 121143642 is 246341121.

It is a super-3 number, since 3×121143642³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121143641) 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, 23734 + ... + 28382.

It is an arithmetic number, because the mean of its divisors is an integer number (7825950).

Almost surely, 2^121143642 is an apocalyptic number.

121143642 is an abundant number, since it is smaller than the sum of its proper divisors (129286758).

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

121143642 is a wasteful number, since it uses less digits than its factorization.

121143642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4798.

The product of its digits is 1152, while the sum is 24.

The square root of 121143642 is about 11006.5272452304. The cubic root of 121143642 is about 494.8043875592.

Adding to 121143642 its reverse (246341121), we get a palindrome (367484763).

The spelling of 121143642 in words is "one hundred twenty-one million, one hundred forty-three thousand, six hundred forty-two".