1299157 has 4 divisors (see below), whose sum is σ = 1375596. Its totient is φ = 1222720.

The previous prime is 1299143. The next prime is 1299169. The reversal of 1299157 is 7519921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7519921 = 1373 ⋅5477.

It can be written as a sum of positive squares in 2 ways, for example, as 463761 + 835396 = 681^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1299157 - 2⁷ = 1299029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299187) 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, 38194 + ... + 38227.

It is an arithmetic number, because the mean of its divisors is an integer number (343899).

2^1299157 is an apocalyptic number.

1299157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1299157 is a deficient number, since it is larger than the sum of its proper divisors (76439).

1299157 is an equidigital number, since it uses as much as digits as its factorization.

1299157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76438.

The product of its digits is 5670, while the sum is 34.

The square root of 1299157 is about 1139.8056851938. The cubic root of 1299157 is about 109.1156923281.

The spelling of 1299157 in words is "one million, two hundred ninety-nine thousand, one hundred fifty-seven".