1491651 has 12 divisors (see below), whose sum is σ = 2462512. Its totient is φ = 852336.

The previous prime is 1491649. The next prime is 1491653. The reversal of 1491651 is 1561941.

1491651 is a `hidden beast` number, since 1 + 4 + 9 + 1 + 651 = 666.

It is an interprime number because it is at equal distance from previous prime (1491649) and next prime (1491653).

It is not a de Polignac number, because 1491651 - 2¹ = 1491649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11776 + ... + 11901.

2^1491651 is an apocalyptic number.

1491651 is a deficient number, since it is larger than the sum of its proper divisors (970861).

1491651 is a wasteful number, since it uses less digits than its factorization.

1491651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23690 (or 23687 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 1491651 is about 1221.3316502900. The cubic root of 1491651 is about 114.2586463426.

The spelling of 1491651 in words is "one million, four hundred ninety-one thousand, six hundred fifty-one".