1401623042 has 4 divisors (see below), whose sum is σ = 2102434566. Its totient is φ = 700811520.

The previous prime is 1401623039. The next prime is 1401623053. The reversal of 1401623042 is 2403261041.

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., 1050472921 + 351150121 = 32411^2 + 18739^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1401622999 and 1401623017.

It is an unprimeable number.

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, 350405759 + ... + 350405762.

Almost surely, 2^1401623042 is an apocalyptic number.

1401623042 is a deficient number, since it is larger than the sum of its proper divisors (700811524).

1401623042 is an equidigital number, since it uses as much as digits as its factorization.

1401623042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700811523.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1401623042 is about 37438.2563963655. The cubic root of 1401623042 is about 1119.1210796864.

Adding to 1401623042 its reverse (2403261041), we get a palindrome (3804884083).

The spelling of 1401623042 in words is "one billion, four hundred one million, six hundred twenty-three thousand, forty-two".