1025211605 has 24 divisors (see below), whose sum is σ = 1425708000. Its totient is φ = 701738240.

The previous prime is 1025211569. The next prime is 1025211641. The reversal of 1025211605 is 5061125201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1025211569) and next prime (1025211641).

It is not a de Polignac number, because 1025211605 - 2¹⁴ = 1025195221 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16355 + ... + 48144.

It is an arithmetic number, because the mean of its divisors is an integer number (59404500).

Almost surely, 2^1025211605 is an apocalyptic number.

It is an amenable number.

1025211605 is a deficient number, since it is larger than the sum of its proper divisors (400496395).

1025211605 is a wasteful number, since it uses less digits than its factorization.

1025211605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64549 (or 64532 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1025211605 is about 32018.9257315107. The cubic root of 1025211605 is about 1008.3342162109.

Adding to 1025211605 its reverse (5061125201), we get a palindrome (6086336806).

The spelling of 1025211605 in words is "one billion, twenty-five million, two hundred eleven thousand, six hundred five".