121177640 has 32 divisors (see below), whose sum is σ = 273861000. Its totient is φ = 48255744.

The previous prime is 121177633. The next prime is 121177643. The reversal of 121177640 is 46771121.

It can be written as a sum of positive squares in 4 ways, for example, as 117635716 + 3541924 = 10846^2 + 1882^2 .

It is not an unprimeable number, because it can be changed into a prime (121177643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2546 + ... + 15774.

Almost surely, 2^121177640 is an apocalyptic number.

121177640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121177640 is an abundant number, since it is smaller than the sum of its proper divisors (152683360).

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

121177640 is a wasteful number, since it uses less digits than its factorization.

121177640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13469 (or 13465 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 121177640 is about 11008.0715840696. The cubic root of 121177640 is about 494.8506708690.

The spelling of 121177640 in words is "one hundred twenty-one million, one hundred seventy-seven thousand, six hundred forty".