1525000145 has 8 divisors (see below), whose sum is σ = 1837855656. Its totient is φ = 1214763136.

The previous prime is 1525000133. The next prime is 1525000157. The reversal of 1525000145 is 5410005251.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1525000133) and next prime (1525000157).

It can be written as a sum of positive squares in 4 ways, for example, as 42981136 + 1482019009 = 6556^2 + 38497^2 .

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 1525000145 - 2¹⁸ = 1524738001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1525000145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653342 + ... + 655671.

It is an arithmetic number, because the mean of its divisors is an integer number (229731957).

Almost surely, 2^1525000145 is an apocalyptic number.

It is an amenable number.

1525000145 is a deficient number, since it is larger than the sum of its proper divisors (312855511).

1525000145 is a wasteful number, since it uses less digits than its factorization.

1525000145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309251.

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

The square root of 1525000145 is about 39051.2502360680. The cubic root of 1525000145 is about 1151.0387954626.

Adding to 1525000145 its reverse (5410005251), we get a palindrome (6935005396).

The spelling of 1525000145 in words is "one billion, five hundred twenty-five million, one hundred forty-five", and thus it is an aban number.