3990122 has 4 divisors (see below), whose sum is σ = 5985186. Its totient is φ = 1995060.

The previous prime is 3990113. The next prime is 3990127. The reversal of 3990122 is 2210993.

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

It can be written as a sum of positive squares in only one way, i.e., 2374681 + 1615441 = 1541^2 + 1271^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3990091 and 3990100.

It is not an unprimeable number, because it can be changed into a prime (3990127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997529 + ... + 997532.

Almost surely, 2^3990122 is an apocalyptic number.

3990122 is a deficient number, since it is larger than the sum of its proper divisors (1995064).

3990122 is a wasteful number, since it uses less digits than its factorization.

3990122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995063.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 3990122 is about 1997.5289735070. The cubic root of 3990122 is about 158.6093279229.

The spelling of 3990122 in words is "three million, nine hundred ninety thousand, one hundred twenty-two".