1642727407 has 8 divisors (see below), whose sum is σ = 1658156112. Its totient is φ = 1627348800.

The previous prime is 1642727399. The next prime is 1642727419. The reversal of 1642727407 is 7047272461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1642727407 - 2³ = 1642727399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1642727407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642727447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55057 + ... + 79477.

It is an arithmetic number, because the mean of its divisors is an integer number (207269514).

Almost surely, 2^1642727407 is an apocalyptic number.

1642727407 is a deficient number, since it is larger than the sum of its proper divisors (15428705).

1642727407 is a wasteful number, since it uses less digits than its factorization.

1642727407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25049.

The product of its (nonzero) digits is 131712, while the sum is 40.

The square root of 1642727407 is about 40530.5737314438. The cubic root of 1642727407 is about 1179.9270775102.

Adding to 1642727407 its reverse (7047272461), we get a palindrome (8689999868).

It can be divided in two parts, 16427 and 27407, that added together give a palindrome (43834).

The spelling of 1642727407 in words is "one billion, six hundred forty-two million, seven hundred twenty-seven thousand, four hundred seven".