2687421 has 32 divisors (see below), whose sum is σ = 4202496. Its totient is φ = 1512000.

The previous prime is 2687393. The next prime is 2687423. The reversal of 2687421 is 1247862.

It is not a de Polignac number, because 2687421 - 2⁶ = 2687357 is a prime.

2687421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2687423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37816 + ... + 37886.

It is an arithmetic number, because the mean of its divisors is an integer number (131328).

2^2687421 is an apocalyptic number.

It is an amenable number.

2687421 is a deficient number, since it is larger than the sum of its proper divisors (1515075).

2687421 is a wasteful number, since it uses less digits than its factorization.

2687421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153.

The product of its digits is 5376, while the sum is 30.

The square root of 2687421 is about 1639.3355361243. The cubic root of 2687421 is about 139.0310818473.

The spelling of 2687421 in words is "two million, six hundred eighty-seven thousand, four hundred twenty-one".