1491498641 has 8 divisors (see below), whose sum is σ = 1558134144. Its totient is φ = 1425012160.

The previous prime is 1491498577. The next prime is 1491498683. The reversal of 1491498641 is 1468941941.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1491498641 - 2⁶ = 1491498577 is a prime.

It is a super-2 number, since 2×1491498641² = 4449136392209693762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491498941) 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, 16541 + ... + 57066.

It is an arithmetic number, because the mean of its divisors is an integer number (194766768).

Almost surely, 2^1491498641 is an apocalyptic number.

It is an amenable number.

1491498641 is a deficient number, since it is larger than the sum of its proper divisors (66635503).

1491498641 is an equidigital number, since it uses as much as digits as its factorization.

1491498641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74511.

The product of its digits is 248832, while the sum is 47.

The square root of 1491498641 is about 38619.9254401145. The cubic root of 1491498641 is about 1142.5475603897.

The spelling of 1491498641 in words is "one billion, four hundred ninety-one million, four hundred ninety-eight thousand, six hundred forty-one".