1025531 has 4 divisors (see below), whose sum is σ = 1104432. Its totient is φ = 946632.

The previous prime is 1025513. The next prime is 1025537. The reversal of 1025531 is 1355201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1355201 = 463 ⋅2927.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025531 is a prime.

It is a super-2 number, since 2×1025531² = 2103427663922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39431 + ... + 39456.

It is an arithmetic number, because the mean of its divisors is an integer number (276108).

2^1025531 is an apocalyptic number.

1025531 is a deficient number, since it is larger than the sum of its proper divisors (78901).

1025531 is an equidigital number, since it uses as much as digits as its factorization.

1025531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78900.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1025531 is about 1012.6850448190. The cubic root of 1025531 is about 100.8438917675.

The spelling of 1025531 in words is "one million, twenty-five thousand, five hundred thirty-one".