126890505 has 48 divisors (see below), whose sum is σ = 252330624. Its totient is φ = 57784320.

The previous prime is 126890411. The next prime is 126890507. The reversal of 126890505 is 505098621.

It is a happy number.

126890505 is a `hidden beast` number, since 1 + 2 + 68 + 90 + 505 = 666.

It is not a de Polignac number, because 126890505 - 2¹³ = 126882313 is a prime.

It is a super-2 number, since 2×126890505² = 32202400518310050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 126890505.

It is not an unprimeable number, because it can be changed into a prime (126890507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103657 + ... + 104873.

It is an arithmetic number, because the mean of its divisors is an integer number (5256888).

Almost surely, 2^126890505 is an apocalyptic number.

126890505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126890505 is a deficient number, since it is larger than the sum of its proper divisors (125440119).

126890505 is a wasteful number, since it uses less digits than its factorization.

126890505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 126890505 is about 11264.5685669714. The cubic root of 126890505 is about 502.5080714527.

The spelling of 126890505 in words is "one hundred twenty-six million, eight hundred ninety thousand, five hundred five".