1201491 has 6 divisors (see below), whose sum is σ = 1735500. Its totient is φ = 800988.

The previous prime is 1201489. The next prime is 1201493. The reversal of 1201491 is 1941021.

It is an interprime number because it is at equal distance from previous prime (1201489) and next prime (1201493).

It is not a de Polignac number, because 1201491 - 2¹ = 1201489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66741 + ... + 66758.

It is an arithmetic number, because the mean of its divisors is an integer number (289250).

2^1201491 is an apocalyptic number.

1201491 is a deficient number, since it is larger than the sum of its proper divisors (534009).

1201491 is a wasteful number, since it uses less digits than its factorization.

1201491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133505 (or 133502 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1201491 is about 1096.1254490249. The cubic root of 1201491 is about 106.3098504784.

The spelling of 1201491 in words is "one million, two hundred one thousand, four hundred ninety-one".