4021736 has 8 divisors (see below), whose sum is σ = 7540770. Its totient is φ = 2010864.

The previous prime is 4021733. The next prime is 4021739. The reversal of 4021736 is 6371204.

It is an interprime number because it is at equal distance from previous prime (4021733) and next prime (4021739).

It can be written as a sum of positive squares in only one way, i.e., 2044900 + 1976836 = 1430^2 + 1406^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (4021733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251351 + ... + 251366.

Almost surely, 2^4021736 is an apocalyptic number.

It is an amenable number.

4021736 is a deficient number, since it is larger than the sum of its proper divisors (3519034).

4021736 is a wasteful number, since it uses less digits than its factorization.

4021736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502723 (or 502719 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 4021736 is about 2005.4266379003. The cubic root of 4021736 is about 159.0271171924.

The spelling of 4021736 in words is "four million, twenty-one thousand, seven hundred thirty-six".