2738421 has 16 divisors (see below), whose sum is σ = 4636800. Its totient is φ = 1564704.

The previous prime is 2738389. The next prime is 2738423. The reversal of 2738421 is 1248372.

It is not a de Polignac number, because 2738421 - 2⁵ = 2738389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

2738421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2738423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7056 + ... + 7433.

It is an arithmetic number, because the mean of its divisors is an integer number (289800).

2^2738421 is an apocalyptic number.

2738421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2738421 is a deficient number, since it is larger than the sum of its proper divisors (1898379).

2738421 is a wasteful number, since it uses less digits than its factorization.

2738421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14505 (or 14499 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2738421 is about 1654.8175125977. The cubic root of 2738421 is about 139.9050546721.

The spelling of 2738421 in words is "two million, seven hundred thirty-eight thousand, four hundred twenty-one".