126615280 has 40 divisors (see below), whose sum is σ = 321144624. Its totient is φ = 46041600.

The previous prime is 126615271. The next prime is 126615287. The reversal of 126615280 is 82516621.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126615287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71061 + ... + 72820.

Almost surely, 2^126615280 is an apocalyptic number.

126615280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126615280 is an abundant number, since it is smaller than the sum of its proper divisors (194529344).

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

126615280 is a wasteful number, since it uses less digits than its factorization.

126615280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143905 (or 143899 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 126615280 is about 11252.3455332655. The cubic root of 126615280 is about 502.1444957926.

It can be divided in two parts, 1 and 26615280, that added together give a square (26615281 = 5159²).

The spelling of 126615280 in words is "one hundred twenty-six million, six hundred fifteen thousand, two hundred eighty".