126640363 has 4 divisors (see below), whose sum is σ = 130725568. Its totient is φ = 122555160.

The previous prime is 126640337. The next prime is 126640399. The reversal of 126640363 is 363046621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126640363 - 2¹³ = 126632171 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 4085173 = 126640363 / (1 + 2 + 6 + 6 + 4 + 0 + 3 + 6 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126640313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2042556 + ... + 2042617.

It is an arithmetic number, because the mean of its divisors is an integer number (32681392).

Almost surely, 2^126640363 is an apocalyptic number.

126640363 is a deficient number, since it is larger than the sum of its proper divisors (4085205).

126640363 is an equidigital number, since it uses as much as digits as its factorization.

126640363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085204.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 126640363 is about 11253.4600456926. The cubic root of 126640363 is about 502.1776525563.

Adding to 126640363 its reverse (363046621), we get a palindrome (489686984).

The spelling of 126640363 in words is "one hundred twenty-six million, six hundred forty thousand, three hundred sixty-three".