1025408105 has 8 divisors (see below), whose sum is σ = 1230957000. Its totient is φ = 820014976.

The previous prime is 1025408099. The next prime is 1025408107. The reversal of 1025408105 is 5018045201.

It can be written as a sum of positive squares in 4 ways, for example, as 81198121 + 944209984 = 9011^2 + 30728^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1025408105 - 2⁴ = 1025408089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1025408107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23930 + ... + 51219.

It is an arithmetic number, because the mean of its divisors is an integer number (153869625).

Almost surely, 2^1025408105 is an apocalyptic number.

It is an amenable number.

1025408105 is a deficient number, since it is larger than the sum of its proper divisors (205548895).

1025408105 is an equidigital number, since it uses as much as digits as its factorization.

1025408105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77883.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 1025408105 is about 32021.9940821929. The cubic root of 1025408105 is about 1008.3986338118.

The spelling of 1025408105 in words is "one billion, twenty-five million, four hundred eight thousand, one hundred five".