3138457 has 4 divisors (see below), whose sum is σ = 3586816. Its totient is φ = 2690100.

The previous prime is 3138449. The next prime is 3138469. The reversal of 3138457 is 7548313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7548313 = 53 ⋅142421.

It is not a de Polignac number, because 3138457 - 2³ = 3138449 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 (3136457) 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, 224169 + ... + 224182.

It is an arithmetic number, because the mean of its divisors is an integer number (896704).

Almost surely, 2^3138457 is an apocalyptic number.

It is an amenable number.

3138457 is a deficient number, since it is larger than the sum of its proper divisors (448359).

3138457 is an equidigital number, since it uses as much as digits as its factorization.

3138457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448358.

The product of its digits is 10080, while the sum is 31.

The square root of 3138457 is about 1771.5690785290. The cubic root of 3138457 is about 146.4104450977.

The spelling of 3138457 in words is "three million, one hundred thirty-eight thousand, four hundred fifty-seven".