1405102042 has 4 divisors (see below), whose sum is σ = 2107653066. Its totient is φ = 702551020.

The previous prime is 1405102031. The next prime is 1405102067. The reversal of 1405102042 is 2402015041.

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., 1388382121 + 16719921 = 37261^2 + 4089^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 351275509 + ... + 351275512.

Almost surely, 2^1405102042 is an apocalyptic number.

1405102042 is a deficient number, since it is larger than the sum of its proper divisors (702551024).

1405102042 is an equidigital number, since it uses as much as digits as its factorization.

1405102042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702551023.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1405102042 is about 37484.6907683657. The cubic root of 1405102042 is about 1120.0462464960.

Adding to 1405102042 its reverse (2402015041), we get a palindrome (3807117083).

The spelling of 1405102042 in words is "one billion, four hundred five million, one hundred two thousand, forty-two".