126690407 has 4 divisors (see below), whose sum is σ = 127390536. Its totient is φ = 125990280.

The previous prime is 126690401. The next prime is 126690413. The reversal of 126690407 is 704096621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704096621 = 26437 ⋅26633.

It is an interprime number because it is at equal distance from previous prime (126690401) and next prime (126690413).

It is a cyclic number.

It is not a de Polignac number, because 126690407 - 2⁴ = 126690391 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 (126690401) 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, 349793 + ... + 350154.

It is an arithmetic number, because the mean of its divisors is an integer number (31847634).

Almost surely, 2^126690407 is an apocalyptic number.

126690407 is a deficient number, since it is larger than the sum of its proper divisors (700129).

126690407 is an equidigital number, since it uses as much as digits as its factorization.

126690407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700128.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 126690407 is about 11255.6833199944. The cubic root of 126690407 is about 502.2437917352.

The spelling of 126690407 in words is "one hundred twenty-six million, six hundred ninety thousand, four hundred seven".