1402556221 has 8 divisors (see below), whose sum is σ = 1540332000. Its totient is φ = 1266492240.

The previous prime is 1402556213. The next prime is 1402556237. The reversal of 1402556221 is 1226552041.

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 1402556221 - 2³ = 1402556213 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 1402556221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402556621) 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, 426231 + ... + 429508.

It is an arithmetic number, because the mean of its divisors is an integer number (192541500).

Almost surely, 2^1402556221 is an apocalyptic number.

1402556221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1402556221 is a deficient number, since it is larger than the sum of its proper divisors (137775779).

1402556221 is a wasteful number, since it uses less digits than its factorization.

1402556221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855899.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1402556221 is about 37450.7172294470. The cubic root of 1402556221 is about 1119.3693891048.

The spelling of 1402556221 in words is "one billion, four hundred two million, five hundred fifty-six thousand, two hundred twenty-one".