1491000426 has 64 divisors (see below), whose sum is σ = 3382767360. Its totient is φ = 486682560.

The previous prime is 1491000391. The next prime is 1491000439. The reversal of 1491000426 is 6240001941.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1491000426.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 600700 + ... + 603176.

It is an arithmetic number, because the mean of its divisors is an integer number (52855740).

Almost surely, 2^1491000426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491000426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1691383680).

1491000426 is an abundant number, since it is smaller than the sum of its proper divisors (1891766934).

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

1491000426 is a wasteful number, since it uses less digits than its factorization.

1491000426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2716 (or 2710 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1491000426 is about 38613.4746688251. The cubic root of 1491000426 is about 1142.4203286890.

The spelling of 1491000426 in words is "one billion, four hundred ninety-one million, four hundred twenty-six", and thus it is an aban number.