4088421 has 8 divisors (see below), whose sum is σ = 6056960. Its totient is φ = 2725596.

The previous prime is 4088417. The next prime is 4088423. The reversal of 4088421 is 1248804.

It is not a de Polignac number, because 4088421 - 2² = 4088417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 151423 = 4088421 / (4 + 0 + 8 + 8 + 4 + 2 + 1).

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

4088421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4088423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75685 + ... + 75738.

It is an arithmetic number, because the mean of its divisors is an integer number (757120).

Almost surely, 2^4088421 is an apocalyptic number.

It is an amenable number.

4088421 is a deficient number, since it is larger than the sum of its proper divisors (1968539).

4088421 is a wasteful number, since it uses less digits than its factorization.

4088421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151432 (or 151426 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 4088421 is about 2021.9844213050. The cubic root of 4088421 is about 159.9012541746.

The spelling of 4088421 in words is "four million, eighty-eight thousand, four hundred twenty-one".