121740057 has 32 divisors (see below), whose sum is σ = 187824000. Its totient is φ = 77837760.

The previous prime is 121740053. The next prime is 121740061. The reversal of 121740057 is 750047121.

It is an interprime number because it is at equal distance from previous prime (121740053) and next prime (121740061).

It is not a de Polignac number, because 121740057 - 2² = 121740053 is a prime.

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 121740057.

It is not an unprimeable number, because it can be changed into a prime (121740053) 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 31 ways as a sum of consecutive naturals, for example, 141294 + ... + 142152.

It is an arithmetic number, because the mean of its divisors is an integer number (5869500).

Almost surely, 2^121740057 is an apocalyptic number.

It is an amenable number.

121740057 is a deficient number, since it is larger than the sum of its proper divisors (66083943).

121740057 is a wasteful number, since it uses less digits than its factorization.

121740057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 121740057 is about 11033.5876758197. The cubic root of 121740057 is about 495.6150664650.

Adding to 121740057 its reverse (750047121), we get a palindrome (871787178).

The spelling of 121740057 in words is "one hundred twenty-one million, seven hundred forty thousand, fifty-seven".