45787021 has 6 divisors (see below), whose sum is σ = 53262510. Its totient is φ = 39245976.

The previous prime is 45787003. The next prime is 45787039. The reversal of 45787021 is 12078754.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (45787003) and next prime (45787039).

It can be written as a sum of positive squares in only one way, i.e., 23328900 + 22458121 = 4830^2 + 4739^2 .

It is not a de Polignac number, because 45787021 - 2⁷ = 45786893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45787051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 467166 + ... + 467263.

It is an arithmetic number, because the mean of its divisors is an integer number (8877085).

Almost surely, 2^45787021 is an apocalyptic number.

It is an amenable number.

45787021 is a deficient number, since it is larger than the sum of its proper divisors (7475489).

45787021 is an equidigital number, since it uses as much as digits as its factorization.

45787021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934443 (or 934436 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 45787021 is about 6766.6107468954. The cubic root of 45787021 is about 357.7509503444.

It can be divided in two parts, 457 and 87021, that added together give a palindrome (87478).

The spelling of 45787021 in words is "forty-five million, seven hundred eighty-seven thousand, twenty-one".