1200913 has 4 divisors (see below), whose sum is σ = 1372480. Its totient is φ = 1029348.

The previous prime is 1200889. The next prime is 1200917. The reversal of 1200913 is 3190021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3190021 = 197 ⋅16193.

It is a cyclic number.

It is not a de Polignac number, because 1200913 - 2¹³ = 1192721 is a prime.

It is a Duffinian number.

1200913 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1200917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85773 + ... + 85786.

It is an arithmetic number, because the mean of its divisors is an integer number (343120).

2^1200913 is an apocalyptic number.

It is an amenable number.

1200913 is a deficient number, since it is larger than the sum of its proper divisors (171567).

1200913 is an equidigital number, since it uses as much as digits as its factorization.

1200913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171566.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1200913 is about 1095.8617613550. The cubic root of 1200913 is about 106.2928002883.

Adding to 1200913 its reverse (3190021), we get a palindrome (4390934).

The spelling of 1200913 in words is "one million, two hundred thousand, nine hundred thirteen".