126542340 has 36 divisors (see below), whose sum is σ = 383845644. Its totient is φ = 33744576.

The previous prime is 126542333. The next prime is 126542363. The reversal of 126542340 is 43245621.

126542340 is a `hidden beast` number, since 1 + 2 + 654 + 2 + 3 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 36216324 + 90326016 = 6018^2 + 9504^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351327 + ... + 351686.

It is an arithmetic number, because the mean of its divisors is an integer number (10662379).

Almost surely, 2^126542340 is an apocalyptic number.

126542340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126542340 is an abundant number, since it is smaller than the sum of its proper divisors (257303304).

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

126542340 is a wasteful number, since it uses less digits than its factorization.

126542340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703028 (or 703023 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 126542340 is about 11249.1039643164. The cubic root of 126542340 is about 502.0480528383.

Adding to 126542340 its reverse (43245621), we get a palindrome (169787961).

It can be divided in two parts, 12654 and 2340, that multiplied together give a triangular number (29610360 = T₇₆₉₅).

The spelling of 126542340 in words is "one hundred twenty-six million, five hundred forty-two thousand, three hundred forty".