126291407 has 4 divisors (see below), whose sum is σ = 137772456. Its totient is φ = 114810360.

The previous prime is 126291401. The next prime is 126291409. The reversal of 126291407 is 704192621.

It is a happy number.

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 126291407 - 2⁴ = 126291391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126291401) 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, 5740508 + ... + 5740529.

It is an arithmetic number, because the mean of its divisors is an integer number (34443114).

Almost surely, 2^126291407 is an apocalyptic number.

126291407 is a deficient number, since it is larger than the sum of its proper divisors (11481049).

126291407 is a wasteful number, since it uses less digits than its factorization.

126291407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11481048.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 126291407 is about 11237.9449633819. The cubic root of 126291407 is about 501.7159800875.

The spelling of 126291407 in words is "one hundred twenty-six million, two hundred ninety-one thousand, four hundred seven".