121403870 has 48 divisors (see below), whose sum is σ = 260448048. Its totient is φ = 40602240.

The previous prime is 121403839. The next prime is 121403881. The reversal of 121403870 is 78304121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17069 + ... + 23111.

It is an arithmetic number, because the mean of its divisors is an integer number (5426001).

Almost surely, 2^121403870 is an apocalyptic number.

121403870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121403870 is an abundant number, since it is smaller than the sum of its proper divisors (139044178).

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

121403870 is a wasteful number, since it uses less digits than its factorization.

121403870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6105 (or 6098 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 121403870 is about 11018.3424343229. The cubic root of 121403870 is about 495.1584297147.

Adding to 121403870 its reverse (78304121), we get a palindrome (199707991).

The spelling of 121403870 in words is "one hundred twenty-one million, four hundred three thousand, eight hundred seventy".