2742487 has 4 divisors (see below), whose sum is σ = 2991816. Its totient is φ = 2493160.

The previous prime is 2742473. The next prime is 2742503. The reversal of 2742487 is 7842472.

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 2742487 - 2¹⁹ = 2218199 is a prime.

It is a Duffinian number.

2742487 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2742407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124648 + ... + 124669.

It is an arithmetic number, because the mean of its divisors is an integer number (747954).

2^2742487 is an apocalyptic number.

2742487 is a deficient number, since it is larger than the sum of its proper divisors (249329).

2742487 is a wasteful number, since it uses less digits than its factorization.

2742487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249328.

The product of its digits is 25088, while the sum is 34.

The square root of 2742487 is about 1656.0455911599. The cubic root of 2742487 is about 139.9742639768.

The spelling of 2742487 in words is "two million, seven hundred forty-two thousand, four hundred eighty-seven".