1525151 has 4 divisors (see below), whose sum is σ = 1546704. Its totient is φ = 1503600.

The previous prime is 1525133. The next prime is 1525157. The reversal of 1525151 is 1515251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1525151 - 2¹⁸ = 1263007 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 (1525157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10670 + ... + 10811.

It is an arithmetic number, because the mean of its divisors is an integer number (386676).

2^1525151 is an apocalyptic number.

1525151 is a deficient number, since it is larger than the sum of its proper divisors (21553).

1525151 is an equidigital number, since it uses as much as digits as its factorization.

1525151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21552.

The product of its digits is 250, while the sum is 20.

The square root of 1525151 is about 1234.9700401224. The cubic root of 1525151 is about 115.1076748297.

Subtracting from 1525151 its sum of digits (20), we obtain a triangular number (1525131 = T₁₇₄₆).

The spelling of 1525151 in words is "one million, five hundred twenty-five thousand, one hundred fifty-one".