1340436154 has 4 divisors (see below), whose sum is σ = 2010654234. Its totient is φ = 670218076.

The previous prime is 1340436151. The next prime is 1340436191. The reversal of 1340436154 is 4516340431.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1326634929 + 13801225 = 36423^2 + 3715^2 .

It is not an unprimeable number, because it can be changed into a prime (1340436151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335109037 + ... + 335109040.

Almost surely, 2^1340436154 is an apocalyptic number.

1340436154 is a deficient number, since it is larger than the sum of its proper divisors (670218080).

1340436154 is an equidigital number, since it uses as much as digits as its factorization.

1340436154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670218079.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 1340436154 is about 36611.9673604137. The cubic root of 1340436154 is about 1102.5933724907.

Adding to 1340436154 its reverse (4516340431), we get a palindrome (5856776585).

The spelling of 1340436154 in words is "one billion, three hundred forty million, four hundred thirty-six thousand, one hundred fifty-four".