126069551 has 4 divisors (see below), whose sum is σ = 126560352. Its totient is φ = 125578752.

The previous prime is 126069533. The next prime is 126069571. The reversal of 126069551 is 155960621.

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 126069551 - 2⁶ = 126069487 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 (126069571) 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, 245015 + ... + 245528.

It is an arithmetic number, because the mean of its divisors is an integer number (31640088).

Almost surely, 2^126069551 is an apocalyptic number.

126069551 is a deficient number, since it is larger than the sum of its proper divisors (490801).

126069551 is an equidigital number, since it uses as much as digits as its factorization.

126069551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490800.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 126069551 is about 11228.0697806880. The cubic root of 126069551 is about 501.4220198849.

The spelling of 126069551 in words is "one hundred twenty-six million, sixty-nine thousand, five hundred fifty-one".