1525401 has 6 divisors (see below), whose sum is σ = 2203370. Its totient is φ = 1016928.

The previous prime is 1525367. The next prime is 1525409. The reversal of 1525401 is 1045251.

It can be written as a sum of positive squares in only one way, i.e., 1498176 + 27225 = 1224^2 + 165^2 .

It is not a de Polignac number, because 1525401 - 2⁷ = 1525273 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1525409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84736 + ... + 84753.

2^1525401 is an apocalyptic number.

It is an amenable number.

1525401 is a deficient number, since it is larger than the sum of its proper divisors (677969).

1525401 is a wasteful number, since it uses less digits than its factorization.

1525401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169495 (or 169492 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1525401 is about 1235.0712530053. The cubic root of 1525401 is about 115.1139639002.

The spelling of 1525401 in words is "one million, five hundred twenty-five thousand, four hundred one".