1945151 has 4 divisors (see below), whose sum is σ = 2094792. Its totient is φ = 1795512.

The previous prime is 1945129. The next prime is 1945169. The reversal of 1945151 is 1515491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1515491 = 127 ⋅11933.

It is a cyclic number.

It is not a de Polignac number, because 1945151 - 2¹⁰ = 1944127 is a prime.

It is a super-2 number, since 2×1945151² = 7567224825602, which contains 22 as substring.

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 1945151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945121) 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, 74801 + ... + 74826.

It is an arithmetic number, because the mean of its divisors is an integer number (523698).

2^1945151 is an apocalyptic number.

1945151 is a deficient number, since it is larger than the sum of its proper divisors (149641).

1945151 is a wasteful number, since it uses less digits than its factorization.

1945151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149640.

The product of its digits is 900, while the sum is 26.

The square root of 1945151 is about 1394.6867031703. The cubic root of 1945151 is about 124.8296559687.

The spelling of 1945151 in words is "one million, nine hundred forty-five thousand, one hundred fifty-one".