1400042221 has 4 divisors (see below), whose sum is σ = 1401360352. Its totient is φ = 1398724092.

The previous prime is 1400042219. The next prime is 1400042239. The reversal of 1400042221 is 1222400041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1400042221 - 2¹ = 1400042219 is a prime.

It is a super-2 number, since 2×1400042221² = 3920236441165225682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1400042195 and 1400042204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400042321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657471 + ... + 659596.

It is an arithmetic number, because the mean of its divisors is an integer number (350340088).

Almost surely, 2^1400042221 is an apocalyptic number.

It is an amenable number.

1400042221 is a deficient number, since it is larger than the sum of its proper divisors (1318131).

1400042221 is a wasteful number, since it uses less digits than its factorization.

1400042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318130.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1400042221 is about 37417.1380653304. The cubic root of 1400042221 is about 1118.7001877221.

Adding to 1400042221 its reverse (1222400041), we get a palindrome (2622442262).

The spelling of 1400042221 in words is "one billion, four hundred million, forty-two thousand, two hundred twenty-one".