126869805 has 12 divisors (see below), whose sum is σ = 219907740. Its totient is φ = 67663872.

The previous prime is 126869803. The next prime is 126869833. The reversal of 126869805 is 508968621.

It can be written as a sum of positive squares in 2 ways, for example, as 31573161 + 95296644 = 5619^2 + 9762^2 .

It is not a de Polignac number, because 126869805 - 2¹ = 126869803 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 2819329 = 126869805 / (1 + 2 + 6 + 8 + 6 + 9 + 8 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126869801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1409620 + ... + 1409709.

It is an arithmetic number, because the mean of its divisors is an integer number (18325645).

Almost surely, 2^126869805 is an apocalyptic number.

126869805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126869805 is a deficient number, since it is larger than the sum of its proper divisors (93037935).

126869805 is a wasteful number, since it uses less digits than its factorization.

126869805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819340 (or 2819337 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 126869805 is about 11263.6497193405. The cubic root of 126869805 is about 502.4807447883.

The spelling of 126869805 in words is "one hundred twenty-six million, eight hundred sixty-nine thousand, eight hundred five".