1491507 has 16 divisors (see below), whose sum is σ = 2270880. Its totient is φ = 966816.

The previous prime is 1491493. The next prime is 1491509. The reversal of 1491507 is 7051941.

It is not a de Polignac number, because 1491507 - 2⁴ = 1491491 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1491509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253 + ... + 1745.

It is an arithmetic number, because the mean of its divisors is an integer number (141930).

2^1491507 is an apocalyptic number.

1491507 is a deficient number, since it is larger than the sum of its proper divisors (779373).

1491507 is a wasteful number, since it uses less digits than its factorization.

1491507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539 (or 1533 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 1491507 is about 1221.2726968208. The cubic root of 1491507 is about 114.2549694828.

The spelling of 1491507 in words is "one million, four hundred ninety-one thousand, five hundred seven".