1642720204 has 12 divisors (see below), whose sum is σ = 2917667704. Its totient is φ = 809100864.

The previous prime is 1642720201. The next prime is 1642720207. The reversal of 1642720204 is 4020272461.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1642720201) and next prime (1642720207).

It is a super-3 number, since 3×1642720204³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1642720201) 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, 3064509 + ... + 3065044.

Almost surely, 2^1642720204 is an apocalyptic number.

It is an amenable number.

1642720204 is a deficient number, since it is larger than the sum of its proper divisors (1274947500).

1642720204 is a wasteful number, since it uses less digits than its factorization.

1642720204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6129624 (or 6129622 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 1642720204 is about 40530.4848725006. The cubic root of 1642720204 is about 1179.9253529338.

Adding to 1642720204 its reverse (4020272461), we get a palindrome (5662992665).

The spelling of 1642720204 in words is "one billion, six hundred forty-two million, seven hundred twenty thousand, two hundred four".