1525401005 has 4 divisors (see below), whose sum is σ = 1830481212. Its totient is φ = 1220320800.

The previous prime is 1525401001. The next prime is 1525401011. The reversal of 1525401005 is 5001045251.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5001045251 = 353 ⋅14167267.

It can be written as a sum of positive squares in 2 ways, for example, as 568488649 + 956912356 = 23843^2 + 30934^2 .

It is not a de Polignac number, because 1525401005 - 2² = 1525401001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525401001) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 152540096 + ... + 152540105.

It is an arithmetic number, because the mean of its divisors is an integer number (457620303).

Almost surely, 2^1525401005 is an apocalyptic number.

It is an amenable number.

1525401005 is a deficient number, since it is larger than the sum of its proper divisors (305080207).

1525401005 is an equidigital number, since it uses as much as digits as its factorization.

1525401005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305080206.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 1525401005 is about 39056.3823849573. The cubic root of 1525401005 is about 1151.1396402594.

Adding to 1525401005 its reverse (5001045251), we get a palindrome (6526446256).

The spelling of 1525401005 in words is "one billion, five hundred twenty-five million, four hundred one thousand, five".