121678425 has 72 divisors (see below), whose sum is σ = 239904288. Its totient is φ = 58464000.

The previous prime is 121678423. The next prime is 121678471. The reversal of 121678425 is 524876121.

It is not a de Polignac number, because 121678425 - 2¹ = 121678423 is a prime.

It is a super-2 number, since 2×121678425² = 29611278220961250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121678425.

It is not an unprimeable number, because it can be changed into a prime (121678423) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 522109 + ... + 522341.

It is an arithmetic number, because the mean of its divisors is an integer number (3332004).

Almost surely, 2^121678425 is an apocalyptic number.

121678425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121678425 is a deficient number, since it is larger than the sum of its proper divisors (118225863).

121678425 is a wasteful number, since it uses less digits than its factorization.

121678425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 463 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 121678425 is about 11030.7943956906. The cubic root of 121678425 is about 495.5314158172.

The spelling of 121678425 in words is "one hundred twenty-one million, six hundred seventy-eight thousand, four hundred twenty-five".