121493751 has 8 divisors (see below), whose sum is σ = 169034880. Its totient is φ = 77474232.

The previous prime is 121493741. The next prime is 121493759. The reversal of 121493751 is 157394121.

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

It is not a de Polignac number, because 121493751 - 2¹⁷ = 121362679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121493759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 880321 + ... + 880458.

It is an arithmetic number, because the mean of its divisors is an integer number (21129360).

Almost surely, 2^121493751 is an apocalyptic number.

121493751 is a deficient number, since it is larger than the sum of its proper divisors (47541129).

121493751 is a wasteful number, since it uses less digits than its factorization.

121493751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760805.

The product of its digits is 7560, while the sum is 33.

The square root of 121493751 is about 11022.4203784831. The cubic root of 121493751 is about 495.2805959362.

The spelling of 121493751 in words is "one hundred twenty-one million, four hundred ninety-three thousand, seven hundred fifty-one".