4391402 has 4 divisors (see below), whose sum is σ = 6587106. Its totient is φ = 2195700.

The previous prime is 4391399. The next prime is 4391411. The reversal of 4391402 is 2041934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2041934 = 2 ⋅1020967.

It can be written as a sum of positive squares in only one way, i.e., 3094081 + 1297321 = 1759^2 + 1139^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1097849 + ... + 1097852.

Almost surely, 2^4391402 is an apocalyptic number.

4391402 is a deficient number, since it is larger than the sum of its proper divisors (2195704).

4391402 is a wasteful number, since it uses less digits than its factorization.

4391402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195703.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 4391402 is about 2095.5672263137. The cubic root of 4391402 is about 163.7574493047.

The spelling of 4391402 in words is "four million, three hundred ninety-one thousand, four hundred two".