121736742 has 16 divisors (see below), whose sum is σ = 246903552. Its totient is φ = 40007240.

The previous prime is 121736729. The next prime is 121736761. The reversal of 121736742 is 247637121.

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, 142458 + ... + 143309.

It is an arithmetic number, because the mean of its divisors is an integer number (15431472).

Almost surely, 2^121736742 is an apocalyptic number.

121736742 is an abundant number, since it is smaller than the sum of its proper divisors (125166810).

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

121736742 is a wasteful number, since it uses less digits than its factorization.

121736742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285843.

The product of its digits is 14112, while the sum is 33.

The square root of 121736742 is about 11033.4374516739. The cubic root of 121736742 is about 495.6105678667.

It can be divided in two parts, 12173 and 6742, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 121736742 in words is "one hundred twenty-one million, seven hundred thirty-six thousand, seven hundred forty-two".