1621142160 has 160 divisors (see below), whose sum is σ = 5496612480. Its totient is φ = 391987200.

The previous prime is 1621142153. The next prime is 1621142167. The reversal of 1621142160 is 612411261.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1621142153) and next prime (1621142167).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1621142160.

It is not an unprimeable number, because it can be changed into a prime (1621142167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1744576 + ... + 1745504.

It is an arithmetic number, because the mean of its divisors is an integer number (34353828).

Almost surely, 2^1621142160 is an apocalyptic number.

1621142160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1621142160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2748306240).

1621142160 is an abundant number, since it is smaller than the sum of its proper divisors (3875470320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1621142160 is a wasteful number, since it uses less digits than its factorization.

1621142160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617 (or 1611 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1621142160 is about 40263.4096916791. The cubic root of 1621142160 is about 1174.7362401779.

The spelling of 1621142160 in words is "one billion, six hundred twenty-one million, one hundred forty-two thousand, one hundred sixty".