1401621356 has 12 divisors (see below), whose sum is σ = 2453330880. Its totient is φ = 700669680.

The previous prime is 1401621349. The next prime is 1401621413. The reversal of 1401621356 is 6531261041.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11036 + ... + 54083.

It is an arithmetic number, because the mean of its divisors is an integer number (204444240).

Almost surely, 2^1401621356 is an apocalyptic number.

It is an amenable number.

1401621356 is a deficient number, since it is larger than the sum of its proper divisors (1051709524).

1401621356 is a wasteful number, since it uses less digits than its factorization.

1401621356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70504 (or 70502 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1401621356 is about 37438.2338792844. The cubic root of 1401621356 is about 1119.1206309593.

Adding to 1401621356 its reverse (6531261041), we get a palindrome (7932882397).

The spelling of 1401621356 in words is "one billion, four hundred one million, six hundred twenty-one thousand, three hundred fifty-six".