126403072 has 40 divisors (see below), whose sum is σ = 253769472. Its totient is φ = 62899200.

The previous prime is 126403033. The next prime is 126403087. The reversal of 126403072 is 270304621.

It is a super-2 number, since 2×126403072² = 31955473222074368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138297 + ... + 139207.

Almost surely, 2^126403072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126403072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126884736).

126403072 is an abundant number, since it is smaller than the sum of its proper divisors (127366400).

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

126403072 is an frugal number, since it uses more digits than its factorization.

126403072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200 (or 1184 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 126403072 is about 11242.9120782829. The cubic root of 126403072 is about 501.8638064848.

Adding to 126403072 its reverse (270304621), we get a palindrome (396707693).

The spelling of 126403072 in words is "one hundred twenty-six million, four hundred three thousand, seventy-two".