1097145 has 56 divisors (see below), whose sum is σ = 2308416. Its totient is φ = 489888.

The previous prime is 1097143. The next prime is 1097147. The reversal of 1097145 is 5417901.

It is an interprime number because it is at equal distance from previous prime (1097143) and next prime (1097147).

It is not a de Polignac number, because 1097145 - 2¹ = 1097143 is a prime.

It is a super-3 number, since 3×1097145³ = 3961989675333970875, which contains 333 as substring.

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 (1097141) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 25494 + ... + 25536.

2^1097145 is an apocalyptic number.

1097145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1097145 is an abundant number, since it is smaller than the sum of its proper divisors (1211271).

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

1097145 is an frugal number, since it uses more digits than its factorization.

1097145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 58 counting only the distinct ones).

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

The square root of 1097145 is about 1047.4468960286. The cubic root of 1097145 is about 103.1386262986.

The spelling of 1097145 in words is "one million, ninety-seven thousand, one hundred forty-five".