1621417142 has 8 divisors (see below), whose sum is σ = 2455738896. Its totient is φ = 802837512.

The previous prime is 1621417141. The next prime is 1621417159. The reversal of 1621417142 is 2417141261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621417141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3935273 + ... + 3935684.

It is an arithmetic number, because the mean of its divisors is an integer number (306967362).

Almost surely, 2^1621417142 is an apocalyptic number.

1621417142 is a deficient number, since it is larger than the sum of its proper divisors (834321754).

1621417142 is a wasteful number, since it uses less digits than its factorization.

1621417142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7871062.

The product of its digits is 2688, while the sum is 29.

The square root of 1621417142 is about 40266.8243346803. The cubic root of 1621417142 is about 1174.8026569438.

The spelling of 1621417142 in words is "one billion, six hundred twenty-one million, four hundred seventeen thousand, one hundred forty-two".