121410640 has 40 divisors (see below), whose sum is σ = 303996168. Its totient is φ = 44828160.

The previous prime is 121410623. The next prime is 121410661. The reversal of 121410640 is 46014121.

It can be written as a sum of positive squares in 4 ways, for example, as 322624 + 121088016 = 568^2 + 11004^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57331 + ... + 59410.

Almost surely, 2^121410640 is an apocalyptic number.

121410640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121410640 is an abundant number, since it is smaller than the sum of its proper divisors (182585528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121410640 is a wasteful number, since it uses less digits than its factorization.

121410640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116767 (or 116761 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 121410640 is about 11018.6496450336. The cubic root of 121410640 is about 495.1676335956.

Adding to 121410640 its reverse (46014121), we get a palindrome (167424761).

The spelling of 121410640 in words is "one hundred twenty-one million, four hundred ten thousand, six hundred forty".