3921534 has 24 divisors (see below), whose sum is σ = 8812440. Its totient is φ = 1307016.

The previous prime is 3921529. The next prime is 3921551. The reversal of 3921534 is 4351293.

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

It is a junction number, because it is equal to n+sod(n) for n = 3921498 and 3921507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3549 + ... + 4520.

It is an arithmetic number, because the mean of its divisors is an integer number (367185).

Almost surely, 2^3921534 is an apocalyptic number.

3921534 is an abundant number, since it is smaller than the sum of its proper divisors (4890906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3921534 is an equidigital number, since it uses as much as digits as its factorization.

3921534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8086 (or 8074 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 3921534 is about 1980.2863429312. The cubic root of 3921534 is about 157.6952680114.

The spelling of 3921534 in words is "three million, nine hundred twenty-one thousand, five hundred thirty-four".