126939145 has 4 divisors (see below), whose sum is σ = 152326980. Its totient is φ = 101551312.

The previous prime is 126939143. The next prime is 126939161. The reversal of 126939145 is 541939621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541939621 = 43 ⋅12603247.

It can be written as a sum of positive squares in 2 ways, for example, as 39778249 + 87160896 = 6307^2 + 9336^2 .

It is a cyclic number.

It is not a de Polignac number, because 126939145 - 2¹ = 126939143 is a prime.

It is a super-2 number, since 2×126939145² = 32227093066662050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126939098 and 126939107.

It is not an unprimeable number, because it can be changed into a prime (126939143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12693910 + ... + 12693919.

It is an arithmetic number, because the mean of its divisors is an integer number (38081745).

Almost surely, 2^126939145 is an apocalyptic number.

It is an amenable number.

126939145 is a deficient number, since it is larger than the sum of its proper divisors (25387835).

126939145 is an equidigital number, since it uses as much as digits as its factorization.

126939145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25387834.

The product of its digits is 58320, while the sum is 40.

The square root of 126939145 is about 11266.7273420457. The cubic root of 126939145 is about 502.5722708195.

The spelling of 126939145 in words is "one hundred twenty-six million, nine hundred thirty-nine thousand, one hundred forty-five".