126540381 has 8 divisors (see below), whose sum is σ = 184058784. Its totient is φ = 76691120.

The previous prime is 126540371. The next prime is 126540397. The reversal of 126540381 is 183045621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126540381 - 2⁹ = 126539869 is a prime.

It is a super-2 number, since 2×126540381² = 32024936047250322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126540301) 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, 1917246 + ... + 1917311.

It is an arithmetic number, because the mean of its divisors is an integer number (23007348).

Almost surely, 2^126540381 is an apocalyptic number.

126540381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126540381 is a deficient number, since it is larger than the sum of its proper divisors (57518403).

126540381 is a wasteful number, since it uses less digits than its factorization.

126540381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3834571.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 126540381 is about 11249.0168903776. The cubic root of 126540381 is about 502.0454620923.

The spelling of 126540381 in words is "one hundred twenty-six million, five hundred forty thousand, three hundred eighty-one".