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1340431 = 1970549
BaseRepresentation
bin101000111010000001111
32112002201121
411013100033
5320343211
644421411
714251651
oct5072017
92462647
101340431
118360a4
12547867
1337c171
1426c6d1
151b7271
hex14740f

1340431 has 4 divisors (see below), whose sum is σ = 1411000. Its totient is φ = 1269864.

The previous prime is 1340419. The next prime is 1340441.

1340431 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1340431 is a prime.

It is a super-2 number, since 2×13404312 = 3593510531522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340401) 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, 35256 + ... + 35293.

It is an arithmetic number, because the mean of its divisors is an integer number (352750).

21340431 is an apocalyptic number.

1340431 is a deficient number, since it is larger than the sum of its proper divisors (70569).

1340431 is an equidigital number, since it uses as much as digits as its factorization.

1340431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70568.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1340431 is about 1157.7698389576. The cubic root of 1340431 is about 110.2591959325.

It can be divided in two parts, 1340 and 431, that added together give a palindrome (1771).

The spelling of 1340431 in words is "one million, three hundred forty thousand, four hundred thirty-one".

Divisors: 1 19 70549 1340431