1001405425 has 6 divisors (see below), whose sum is σ = 1241742758. Its totient is φ = 801124320.

The previous prime is 1001405411. The next prime is 1001405437. The reversal of 1001405425 is 5245041001.

It can be written as a sum of positive squares in 3 ways, for example, as 2782224 + 998623201 = 1668^2 + 31601^2 .

It is not a de Polignac number, because 1001405425 - 2⁹ = 1001404913 is a prime.

It is a super-5 number, since 5×1001405425⁵ (a number of 46 digits) contains 55555 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001405396 and 1001405405.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20028084 + ... + 20028133.

Almost surely, 2^1001405425 is an apocalyptic number.

It is an amenable number.

1001405425 is a deficient number, since it is larger than the sum of its proper divisors (240337333).

1001405425 is an equidigital number, since it uses as much as digits as its factorization.

1001405425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40056227 (or 40056222 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1001405425 is about 31644.9905198279. The cubic root of 1001405425 is about 1000.4682557024.

Adding to 1001405425 its reverse (5245041001), we get a palindrome (6246446426).

The spelling of 1001405425 in words is "one billion, one million, four hundred five thousand, four hundred twenty-five".