126699820 has 24 divisors (see below), whose sum is σ = 286537104. Its totient is φ = 46781376.

The previous prime is 126699791. The next prime is 126699863. The reversal of 126699820 is 28996621.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243394 + ... + 243913.

It is an arithmetic number, because the mean of its divisors is an integer number (11939046).

Almost surely, 2^126699820 is an apocalyptic number.

126699820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126699820 is an abundant number, since it is smaller than the sum of its proper divisors (159837284).

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

126699820 is a wasteful number, since it uses less digits than its factorization.

126699820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487329 (or 487327 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 126699820 is about 11256.1014565435. The cubic root of 126699820 is about 502.2562302032.

The spelling of 126699820 in words is "one hundred twenty-six million, six hundred ninety-nine thousand, eight hundred twenty".