126531020 has 48 divisors (see below), whose sum is σ = 331285248. Its totient is φ = 39437760.

The previous prime is 126531011. The next prime is 126531023. The reversal of 126531020 is 20135621.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 126530983 and 126531001.

It is not an unprimeable number, because it can be changed into a prime (126531023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39542 + ... + 42621.

It is an arithmetic number, because the mean of its divisors is an integer number (6901776).

Almost surely, 2^126531020 is an apocalyptic number.

126531020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126531020 is an abundant number, since it is smaller than the sum of its proper divisors (204754228).

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

126531020 is a wasteful number, since it uses less digits than its factorization.

126531020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82190 (or 82188 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 126531020 is about 11248.6008018775. The cubic root of 126531020 is about 502.0330819508.

Adding to 126531020 its reverse (20135621), we get a palindrome (146666641).

The spelling of 126531020 in words is "one hundred twenty-six million, five hundred thirty-one thousand, twenty".