2540019 has 4 divisors (see below), whose sum is σ = 3386696. Its totient is φ = 1693344.

The previous prime is 2540011. The next prime is 2540033. The reversal of 2540019 is 9100452.

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

It is not a de Polignac number, because 2540019 - 2³ = 2540011 is a prime.

It is a super-2 number, since 2×2540019² = 12903393040722, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2539977 and 2540004.

It is not an unprimeable number, because it can be changed into a prime (2540011) 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, 423334 + ... + 423339.

It is an arithmetic number, because the mean of its divisors is an integer number (846674).

2^2540019 is an apocalyptic number.

2540019 is a deficient number, since it is larger than the sum of its proper divisors (846677).

2540019 is an equidigital number, since it uses as much as digits as its factorization.

2540019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846676.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2540019 is about 1593.7437058699. The cubic root of 2540019 is about 136.4412391824.

The spelling of 2540019 in words is "two million, five hundred forty thousand, nineteen".