1025001405 has 32 divisors (see below), whose sum is σ = 1824117120. Its totient is φ = 546099840.

The previous prime is 1025001401. The next prime is 1025001407. The reversal of 1025001405 is 5041005201.

1025001405 is a `hidden beast` number, since 10 + 250 + 0 + 1 + 405 = 666.

1025001405 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1025001405 - 2² = 1025001401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025001401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148225 + ... + 154985.

It is an arithmetic number, because the mean of its divisors is an integer number (57003660).

Almost surely, 2^1025001405 is an apocalyptic number.

1025001405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1025001405 is a deficient number, since it is larger than the sum of its proper divisors (799115715).

1025001405 is a wasteful number, since it uses less digits than its factorization.

1025001405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7898 (or 7892 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1025001405 is about 32015.6431295703. The cubic root of 1025001405 is about 1008.2652982957.

Adding to 1025001405 its reverse (5041005201), we get a palindrome (6066006606).

The spelling of 1025001405 in words is "one billion, twenty-five million, one thousand, four hundred five".