126017820 has 36 divisors (see below), whose sum is σ = 382254600. Its totient is φ = 33604704.

The previous prime is 126017797. The next prime is 126017839. The reversal of 126017820 is 28710621.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 349870 + ... + 350229.

Almost surely, 2^126017820 is an apocalyptic number.

126017820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126017820 is an abundant number, since it is smaller than the sum of its proper divisors (256236780).

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

126017820 is a wasteful number, since it uses less digits than its factorization.

126017820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700114 (or 700109 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 126017820 is about 11225.7658981470. The cubic root of 126017820 is about 501.3534265012.

The spelling of 126017820 in words is "one hundred twenty-six million, seventeen thousand, eight hundred twenty".