126155047 has 4 divisors (see below), whose sum is σ = 126224136. Its totient is φ = 126085960.

The previous prime is 126154997. The next prime is 126155059. The reversal of 126155047 is 740551621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740551621 = 563 ⋅1315367.

It is a cyclic number.

It is not a de Polignac number, because 126155047 - 2¹⁹ = 125630759 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 (126155947) 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, 31729 + ... + 35482.

It is an arithmetic number, because the mean of its divisors is an integer number (31556034).

Almost surely, 2^126155047 is an apocalyptic number.

126155047 is a deficient number, since it is larger than the sum of its proper divisors (69089).

126155047 is an equidigital number, since it uses as much as digits as its factorization.

126155047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69088.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 126155047 is about 11231.8763793055. The cubic root of 126155047 is about 501.5353432830.

The spelling of 126155047 in words is "one hundred twenty-six million, one hundred fifty-five thousand, forty-seven".