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1272491 = 11293989
BaseRepresentation
bin100110110101010101011
32101122112022
410312222223
5311204431
643135055
713546613
oct4665253
92348468
101272491
1179a050
1251448b
1335726c
14251a43
151a207b
hex136aab

1272491 has 8 divisors (see below), whose sum is σ = 1436400. Its totient is φ = 1116640.

The previous prime is 1272461. The next prime is 1272539. The reversal of 1272491 is 1942721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1272491 - 214 = 1256107 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1272491.

It is not an unprimeable number, because it can be changed into a prime (1272421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1676 + ... + 2313.

It is an arithmetic number, because the mean of its divisors is an integer number (179550).

21272491 is an apocalyptic number.

1272491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1272491 is a deficient number, since it is larger than the sum of its proper divisors (163909).

1272491 is a wasteful number, since it uses less digits than its factorization.

1272491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4029.

The product of its digits is 1008, while the sum is 26.

The square root of 1272491 is about 1128.0474280809. The cubic root of 1272491 is about 108.3639697705.

The spelling of 1272491 in words is "one million, two hundred seventy-two thousand, four hundred ninety-one".

Divisors: 1 11 29 319 3989 43879 115681 1272491