70126409 has 4 divisors (see below), whose sum is σ = 70781904. Its totient is φ = 69470916.

The previous prime is 70126361. The next prime is 70126439. The reversal of 70126409 is 90462107.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90462107 = 29 ⋅3119383.

It is a cyclic number.

It is not a de Polignac number, because 70126409 - 2²⁴ = 53349193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70126439) 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, 327587 + ... + 327800.

It is an arithmetic number, because the mean of its divisors is an integer number (17695476).

Almost surely, 2^70126409 is an apocalyptic number.

It is an amenable number.

70126409 is a deficient number, since it is larger than the sum of its proper divisors (655495).

70126409 is a wasteful number, since it uses less digits than its factorization.

70126409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655494.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 70126409 is about 8374.1512405736. The cubic root of 70126409 is about 412.3764605868.

The spelling of 70126409 in words is "seventy million, one hundred twenty-six thousand, four hundred nine".