126121730 has 32 divisors (see below), whose sum is σ = 262033920. Its totient is φ = 42811200.

The previous prime is 126121729. The next prime is 126121741. The reversal of 126121730 is 37121621.

It is a junction number, because it is equal to n+sod(n) for n = 126121696 and 126121705.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1850 + ... + 15989.

It is an arithmetic number, because the mean of its divisors is an integer number (8188560).

Almost surely, 2^126121730 is an apocalyptic number.

126121730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126121730 is an abundant number, since it is smaller than the sum of its proper divisors (135912190).

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

126121730 is a wasteful number, since it uses less digits than its factorization.

126121730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17954.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 126121730 is about 11230.3931364846. The cubic root of 126121730 is about 501.4911882938.

The spelling of 126121730 in words is "one hundred twenty-six million, one hundred twenty-one thousand, seven hundred thirty".