1023157 has 4 divisors (see below), whose sum is σ = 1038496. Its totient is φ = 1007820.

The previous prime is 1023133. The next prime is 1023163. The reversal of 1023157 is 7513201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7513201 = 17 ⋅441953.

It is a cyclic number.

It is not a de Polignac number, because 1023157 - 2¹⁵ = 990389 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 (1023107) 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 3 ways as a sum of consecutive naturals, for example, 7569 + ... + 7702.

It is an arithmetic number, because the mean of its divisors is an integer number (259624).

2^1023157 is an apocalyptic number.

It is an amenable number.

1023157 is a deficient number, since it is larger than the sum of its proper divisors (15339).

1023157 is an equidigital number, since it uses as much as digits as its factorization.

1023157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15338.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 1023157 is about 1011.5122342315. The cubic root of 1023157 is about 100.7660171937.

Adding to 1023157 its reverse (7513201), we get a palindrome (8536358).

The spelling of 1023157 in words is "one million, twenty-three thousand, one hundred fifty-seven".