197421130 has 16 divisors (see below), whose sum is σ = 358809984. Its totient is φ = 78201360.

The previous prime is 197421097. The next prime is 197421149. The reversal of 197421130 is 31124791.

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, 94806 + ... + 96865.

It is an arithmetic number, because the mean of its divisors is an integer number (22425624).

Almost surely, 2^197421130 is an apocalyptic number.

197421130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197421130 is a deficient number, since it is larger than the sum of its proper divisors (161388854).

197421130 is a wasteful number, since it uses less digits than its factorization.

197421130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191781.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 197421130 is about 14050.6629736821. The cubic root of 197421130 is about 582.2791121568.

It can be divided in two parts, 1974 and 21130, that added together give a square (23104 = 152²).

The spelling of 197421130 in words is "one hundred ninety-seven million, four hundred twenty-one thousand, one hundred thirty".