1321150072 has 32 divisors (see below), whose sum is σ = 2759857920. Its totient is φ = 587743840.

The previous prime is 1321150067. The next prime is 1321150073. The reversal of 1321150072 is 2700511231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321150073) 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, 155578 + ... + 163849.

It is an arithmetic number, because the mean of its divisors is an integer number (86245560).

Almost surely, 2^1321150072 is an apocalyptic number.

It is an amenable number.

1321150072 is an abundant number, since it is smaller than the sum of its proper divisors (1438707848).

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

1321150072 is a wasteful number, since it uses less digits than its factorization.

1321150072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319491 (or 319487 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 1321150072 is about 36347.6281482025. The cubic root of 1321150072 is about 1097.2797999495.

The spelling of 1321150072 in words is "one billion, three hundred twenty-one million, one hundred fifty thousand, seventy-two".