1491621092 has 12 divisors (see below), whose sum is σ = 2811132156. Its totient is φ = 688440480.

The previous prime is 1491621083. The next prime is 1491621107. The reversal of 1491621092 is 2901261941.

It can be written as a sum of positive squares in 2 ways, for example, as 369639076 + 1121982016 = 19226^2 + 33496^2 .

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, 14342459 + ... + 14342562.

It is an arithmetic number, because the mean of its divisors is an integer number (234261013).

Almost surely, 2^1491621092 is an apocalyptic number.

It is an amenable number.

1491621092 is a deficient number, since it is larger than the sum of its proper divisors (1319511064).

1491621092 is a wasteful number, since it uses less digits than its factorization.

1491621092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28685038 (or 28685036 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1491621092 is about 38621.5107420722. The cubic root of 1491621092 is about 1142.5788269872.

The spelling of 1491621092 in words is "one billion, four hundred ninety-one million, six hundred twenty-one thousand, ninety-two".