121143894 has 16 divisors (see below), whose sum is σ = 244057968. Its totient is φ = 40086272.

The previous prime is 121143859. The next prime is 121143917. The reversal of 121143894 is 498341121.

It is a happy number.

It is a super-3 number, since 3×121143894³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72867 + ... + 74510.

It is an arithmetic number, because the mean of its divisors is an integer number (15253623).

Almost surely, 2^121143894 is an apocalyptic number.

121143894 is an abundant number, since it is smaller than the sum of its proper divisors (122914074).

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

121143894 is a wasteful number, since it uses less digits than its factorization.

121143894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147519.

The product of its digits is 6912, while the sum is 33.

The square root of 121143894 is about 11006.5386929770. The cubic root of 121143894 is about 494.8047306523.

The spelling of 121143894 in words is "one hundred twenty-one million, one hundred forty-three thousand, eight hundred ninety-four".