2151545 has 8 divisors (see below), whose sum is σ = 2816640. Its totient is φ = 1564720.

The previous prime is 2151533. The next prime is 2151563. The reversal of 2151545 is 5451512.

It is a happy number.

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

It is not a de Polignac number, because 2151545 - 2¹⁶ = 2086009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2151545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19505 + ... + 19614.

It is an arithmetic number, because the mean of its divisors is an integer number (352080).

2^2151545 is an apocalyptic number.

It is an amenable number.

2151545 is a deficient number, since it is larger than the sum of its proper divisors (665095).

2151545 is a wasteful number, since it uses less digits than its factorization.

2151545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39135.

The product of its digits is 1000, while the sum is 23.

The square root of 2151545 is about 1466.8145758752. The cubic root of 2151545 is about 129.0971965432.

The spelling of 2151545 in words is "two million, one hundred fifty-one thousand, five hundred forty-five".