3145531 has 4 divisors (see below), whose sum is σ = 3152872. Its totient is φ = 3138192.

The previous prime is 3145529. The next prime is 3145547. The reversal of 3145531 is 1355413.

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 3145531 - 2¹ = 3145529 is a prime.

It is a super-2 number, since 2×3145531² = 19788730543922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3145511) 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, 2985 + ... + 3898.

It is an arithmetic number, because the mean of its divisors is an integer number (788218).

Almost surely, 2^3145531 is an apocalyptic number.

3145531 is a deficient number, since it is larger than the sum of its proper divisors (7341).

3145531 is an equidigital number, since it uses as much as digits as its factorization.

3145531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7340.

The product of its digits is 900, while the sum is 22.

The square root of 3145531 is about 1773.5644899467. The cubic root of 3145531 is about 146.5203643254.

The spelling of 3145531 in words is "three million, one hundred forty-five thousand, five hundred thirty-one".