1321640152 has 96 divisors (see below), whose sum is σ = 3085182000. Its totient is φ = 527627520.

The previous prime is 1321640147. The next prime is 1321640161. The reversal of 1321640152 is 2510461231.

It is a happy number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 452874 + ... + 455782.

Almost surely, 2^1321640152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321640152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1542591000).

1321640152 is an abundant number, since it is smaller than the sum of its proper divisors (1763541848).

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

1321640152 is a wasteful number, since it uses less digits than its factorization.

1321640152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009 (or 2998 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1321640152 is about 36354.3690909360. The cubic root of 1321640152 is about 1097.4154616522.

The spelling of 1321640152 in words is "one billion, three hundred twenty-one million, six hundred forty thousand, one hundred fifty-two".