1026405117 has 12 divisors (see below), whose sum is σ = 1485504540. Its totient is φ = 682922688.

The previous prime is 1026405113. The next prime is 1026405119. The reversal of 1026405117 is 7115046201.

It is a happy number.

1026405117 is a `hidden beast` number, since 1 + 0 + 2 + 640 + 5 + 1 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 899640036 + 126765081 = 29994^2 + 11259^2 .

It is not a de Polignac number, because 1026405117 - 2² = 1026405113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1026405113) 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, 107448 + ... + 116609.

It is an arithmetic number, because the mean of its divisors is an integer number (123792045).

Almost surely, 2^1026405117 is an apocalyptic number.

It is an amenable number.

1026405117 is a deficient number, since it is larger than the sum of its proper divisors (459099423).

1026405117 is a wasteful number, since it uses less digits than its factorization.

1026405117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224572 (or 224569 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 1026405117 is about 32037.5579125501. The cubic root of 1026405117 is about 1008.7253524655.

The spelling of 1026405117 in words is "one billion, twenty-six million, four hundred five thousand, one hundred seventeen".