2657491 has 8 divisors (see below), whose sum is σ = 2830464. Its totient is φ = 2486400.

The previous prime is 2657483. The next prime is 2657513. The reversal of 2657491 is 1947562.

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 2657491 - 2³ = 2657483 is a prime.

It is a Duffinian number.

2657491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2657401) 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, 3441 + ... + 4141.

It is an arithmetic number, because the mean of its divisors is an integer number (353808).

2^2657491 is an apocalyptic number.

2657491 is a deficient number, since it is larger than the sum of its proper divisors (172973).

2657491 is a wasteful number, since it uses less digits than its factorization.

2657491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941.

The product of its digits is 15120, while the sum is 34.

The square root of 2657491 is about 1630.1812782632. The cubic root of 2657491 is about 138.5130207971.

The spelling of 2657491 in words is "two million, six hundred fifty-seven thousand, four hundred ninety-one".