121145706 has 192 divisors, whose sum is σ = 332107776. Its totient is φ = 32659200.

The previous prime is 121145699. The next prime is 121145719. The reversal of 121145706 is 607541121.

It is a happy number.

It is a super-3 number, since 3×121145706³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 121145706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2817321 + ... + 2817363.

It is an arithmetic number, because the mean of its divisors is an integer number (1729728).

Almost surely, 2^121145706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121145706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166053888).

121145706 is an abundant number, since it is smaller than the sum of its proper divisors (210962070).

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

121145706 is a wasteful number, since it uses less digits than its factorization.

121145706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 121145706 is about 11006.6210073755. The cubic root of 121145706 is about 494.8071976406.

Adding to 121145706 its reverse (607541121), we get a palindrome (728686827).

The spelling of 121145706 in words is "one hundred twenty-one million, one hundred forty-five thousand, seven hundred six".