1340157 has 16 divisors (see below), whose sum is σ = 2199680. Its totient is φ = 706752.

The previous prime is 1340153. The next prime is 1340159. The reversal of 1340157 is 7510431.

It is not a de Polignac number, because 1340157 - 2² = 1340153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2182 + ... + 2727.

It is an arithmetic number, because the mean of its divisors is an integer number (137480).

2^1340157 is an apocalyptic number.

It is an amenable number.

1340157 is a deficient number, since it is larger than the sum of its proper divisors (859523).

1340157 is a wasteful number, since it uses less digits than its factorization.

1340157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 1340157 is about 1157.6515019642. The cubic root of 1340157 is about 110.2516826580.

Adding to 1340157 its reverse (7510431), we get a palindrome (8850588).

The spelling of 1340157 in words is "one million, three hundred forty thousand, one hundred fifty-seven".