1025421405 has 16 divisors (see below), whose sum is σ = 1663784064. Its totient is φ = 539188160.

The previous prime is 1025421401. The next prime is 1025421409. The reversal of 1025421405 is 5041245201.

1025421405 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1025421401) and next prime (1025421409).

It is not a de Polignac number, because 1025421405 - 2² = 1025421401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025421401) 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 15 ways as a sum of consecutive naturals, for example, 480354 + ... + 482483.

It is an arithmetic number, because the mean of its divisors is an integer number (103986504).

Almost surely, 2^1025421405 is an apocalyptic number.

1025421405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1025421405 is a deficient number, since it is larger than the sum of its proper divisors (638362659).

1025421405 is an equidigital number, since it uses as much as digits as its factorization.

1025421405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962916.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1025421405 is about 32022.2017512850. The cubic root of 1025421405 is about 1008.4029935862.

Adding to 1025421405 its reverse (5041245201), we get a palindrome (6066666606).

The spelling of 1025421405 in words is "one billion, twenty-five million, four hundred twenty-one thousand, four hundred five".