3427621 has 4 divisors (see below), whose sum is σ = 3576672. Its totient is φ = 3278572.

The previous prime is 3427607. The next prime is 3427673. The reversal of 3427621 is 1267243.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1267243 = 19 ⋅66697.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3427621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3427691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74491 + ... + 74536.

It is an arithmetic number, because the mean of its divisors is an integer number (894168).

Almost surely, 2^3427621 is an apocalyptic number.

It is an amenable number.

3427621 is a deficient number, since it is larger than the sum of its proper divisors (149051).

3427621 is a wasteful number, since it uses less digits than its factorization.

3427621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149050.

The product of its digits is 2016, while the sum is 25.

The square root of 3427621 is about 1851.3835367098. The cubic root of 3427621 is about 150.7755535706.

The spelling of 3427621 in words is "three million, four hundred twenty-seven thousand, six hundred twenty-one".