1897157 has 8 divisors (see below), whose sum is σ = 1944384. Its totient is φ = 1850688.

The previous prime is 1897141. The next prime is 1897163. The reversal of 1897157 is 7517981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1897157 - 2⁴ = 1897141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1897157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11558 + ... + 11720.

It is an arithmetic number, because the mean of its divisors is an integer number (243048).

2^1897157 is an apocalyptic number.

It is an amenable number.

1897157 is a deficient number, since it is larger than the sum of its proper divisors (47227).

1897157 is a wasteful number, since it uses less digits than its factorization.

1897157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379.

The product of its digits is 17640, while the sum is 38.

The square root of 1897157 is about 1377.3732246563. The cubic root of 1897157 is about 123.7944261129.

The spelling of 1897157 in words is "one million, eight hundred ninety-seven thousand, one hundred fifty-seven".