1627400042 has 4 divisors (see below), whose sum is σ = 2441100066. Its totient is φ = 813700020.

The previous prime is 1627400041. The next prime is 1627400053. The reversal of 1627400042 is 2400047261.

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., 1066610281 + 560789761 = 32659^2 + 23681^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1627399984 and 1627400020.

It is not an unprimeable number, because it can be changed into a prime (1627400041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406850009 + ... + 406850012.

Almost surely, 2^1627400042 is an apocalyptic number.

1627400042 is a deficient number, since it is larger than the sum of its proper divisors (813700024).

1627400042 is an equidigital number, since it uses as much as digits as its factorization.

1627400042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813700023.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 1627400042 is about 40341.0466150793. The cubic root of 1627400042 is about 1176.2458593470.

The spelling of 1627400042 in words is "one billion, six hundred twenty-seven million, four hundred thousand, forty-two".