121487740 has 24 divisors (see below), whose sum is σ = 278317872. Its totient is φ = 44177280.

The previous prime is 121487719. The next prime is 121487741. The reversal of 121487740 is 47784121.

It is a junction number, because it is equal to n+sod(n) for n = 121487696 and 121487705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121487741) 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, 275889 + ... + 276328.

It is an arithmetic number, because the mean of its divisors is an integer number (11596578).

Almost surely, 2^121487740 is an apocalyptic number.

121487740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121487740 is an abundant number, since it is smaller than the sum of its proper divisors (156830132).

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

121487740 is a wasteful number, since it uses less digits than its factorization.

121487740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552237 (or 552235 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 121487740 is about 11022.1477036011. The cubic root of 121487740 is about 495.2724276676.

The spelling of 121487740 in words is "one hundred twenty-one million, four hundred eighty-seven thousand, seven hundred forty".