121145749 has 8 divisors (see below), whose sum is σ = 124198272. Its totient is φ = 118104000.

The previous prime is 121145747. The next prime is 121145779. The reversal of 121145749 is 947541121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121145749 - 2¹ = 121145747 is a prime.

It is a super-3 number, since 3×121145749³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121145747) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23124 + ... + 27874.

It is an arithmetic number, because the mean of its divisors is an integer number (15524784).

Almost surely, 2^121145749 is an apocalyptic number.

It is an amenable number.

121145749 is a deficient number, since it is larger than the sum of its proper divisors (3052523).

121145749 is an equidigital number, since it uses as much as digits as its factorization.

121145749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5387.

The product of its digits is 10080, while the sum is 34.

The square root of 121145749 is about 11006.6229607450. The cubic root of 121145749 is about 494.8072561836.

The spelling of 121145749 in words is "one hundred twenty-one million, one hundred forty-five thousand, seven hundred forty-nine".