2151457 has 8 divisors (see below), whose sum is σ = 2682432. Its totient is φ = 1676400.

The previous prime is 2151451. The next prime is 2151463. The reversal of 2151457 is 7541512.

It is an interprime number because it is at equal distance from previous prime (2151451) and next prime (2151463).

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

It is not a de Polignac number, because 2151457 - 2⁷ = 2151329 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 (2151451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13894 + ... + 14047.

It is an arithmetic number, because the mean of its divisors is an integer number (335304).

2^2151457 is an apocalyptic number.

It is an amenable number.

2151457 is a deficient number, since it is larger than the sum of its proper divisors (530975).

2151457 is a wasteful number, since it uses less digits than its factorization.

2151457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27959.

The product of its digits is 1400, while the sum is 25.

The square root of 2151457 is about 1466.7845785936. The cubic root of 2151457 is about 129.0954364579.

Adding to 2151457 its reverse (7541512), we get a palindrome (9692969).

The spelling of 2151457 in words is "two million, one hundred fifty-one thousand, four hundred fifty-seven".