3952405 has 4 divisors (see below), whose sum is σ = 4742892. Its totient is φ = 3161920.

The previous prime is 3952393. The next prime is 3952423. The reversal of 3952405 is 5042593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5042593 = 1087 ⋅4639.

It can be written as a sum of positive squares in 2 ways, for example, as 2798929 + 1153476 = 1673^2 + 1074^2 .

It is not a de Polignac number, because 3952405 - 2²¹ = 1855253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395236 + ... + 395245.

It is an arithmetic number, because the mean of its divisors is an integer number (1185723).

Almost surely, 2^3952405 is an apocalyptic number.

It is an amenable number.

3952405 is a deficient number, since it is larger than the sum of its proper divisors (790487).

3952405 is an equidigital number, since it uses as much as digits as its factorization.

3952405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790486.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 3952405 is about 1988.0656427794. The cubic root of 3952405 is about 158.1079884525.

Adding to 3952405 its reverse (5042593), we get a palindrome (8994998).

The spelling of 3952405 in words is "three million, nine hundred fifty-two thousand, four hundred five".