1375491 has 12 divisors (see below), whose sum is σ = 1986648. Its totient is φ = 846144.

The previous prime is 1375481. The next prime is 1375513. The reversal of 1375491 is 1945731.

It is not a de Polignac number, because 1375491 - 2¹³ = 1367299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1375411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 850 + ... + 1863.

It is an arithmetic number, because the mean of its divisors is an integer number (165554).

2^1375491 is an apocalyptic number.

1375491 is a deficient number, since it is larger than the sum of its proper divisors (611157).

1375491 is a wasteful number, since it uses less digits than its factorization.

1375491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742 (or 2729 counting only the distinct ones).

The product of its digits is 3780, while the sum is 30.

The square root of 1375491 is about 1172.8132843722. The cubic root of 1375491 is about 111.2122390045.

It can be divided in two parts, 137549 and 1, that added together give a triangular number (137550 = T₅₂₄).

The spelling of 1375491 in words is "one million, three hundred seventy-five thousand, four hundred ninety-one".