121985477 has 8 divisors (see below), whose sum is σ = 123536280. Its totient is φ = 120441600.

The previous prime is 121985471. The next prime is 121985533. The reversal of 121985477 is 774589121.

It can be written as a sum of positive squares in 4 ways, for example, as 96845281 + 25140196 = 9841^2 + 5014^2 .

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 121985477 - 2¹⁸ = 121723333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121985471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39833 + ... + 42785.

It is an arithmetic number, because the mean of its divisors is an integer number (15442035).

Almost surely, 2^121985477 is an apocalyptic number.

It is an amenable number.

121985477 is a deficient number, since it is larger than the sum of its proper divisors (1550803).

121985477 is a wasteful number, since it uses less digits than its factorization.

121985477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3463.

The product of its digits is 141120, while the sum is 44.

The square root of 121985477 is about 11044.7035723011. The cubic root of 121985477 is about 495.9478854476.

The spelling of 121985477 in words is "one hundred twenty-one million, nine hundred eighty-five thousand, four hundred seventy-seven".