3951445 has 4 divisors (see below), whose sum is σ = 4741740. Its totient is φ = 3161152.

The previous prime is 3951443. The next prime is 3951461. The reversal of 3951445 is 5441593.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 439569 + 3511876 = 663^2 + 1874^2 .

It is a cyclic number.

It is not a de Polignac number, because 3951445 - 2¹ = 3951443 is a prime.

It is a super-2 number, since 2×3951445² = 31227835176050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3951443) 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, 395140 + ... + 395149.

It is an arithmetic number, because the mean of its divisors is an integer number (1185435).

Almost surely, 2^3951445 is an apocalyptic number.

It is an amenable number.

3951445 is a deficient number, since it is larger than the sum of its proper divisors (790295).

3951445 is an equidigital number, since it uses as much as digits as its factorization.

3951445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790294.

The product of its digits is 10800, while the sum is 31.

The square root of 3951445 is about 1987.8241873969. The cubic root of 3951445 is about 158.0951864615.

The spelling of 3951445 in words is "three million, nine hundred fifty-one thousand, four hundred forty-five".