2491545 has 32 divisors (see below), whose sum is σ = 4642560. Its totient is φ = 1117440.

The previous prime is 2491523. The next prime is 2491547. The reversal of 2491545 is 5451942.

2491545 = 78² + 79² + ... + 199².

It is not a de Polignac number, because 2491545 - 2⁸ = 2491289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2491547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6211 + ... + 6599.

It is an arithmetic number, because the mean of its divisors is an integer number (145080).

2^2491545 is an apocalyptic number.

It is an amenable number.

2491545 is a deficient number, since it is larger than the sum of its proper divisors (2151015).

2491545 is a wasteful number, since it uses less digits than its factorization.

2491545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465.

The product of its digits is 7200, while the sum is 30.

The square root of 2491545 is about 1578.4628598735. The cubic root of 2491545 is about 135.5677053469.

The spelling of 2491545 in words is "two million, four hundred ninety-one thousand, five hundred forty-five".