7445991 has 24 divisors (see below), whose sum is σ = 11869680. Its totient is φ = 4139856.

The previous prime is 7445989. The next prime is 7445993. The reversal of 7445991 is 1995447.

7445991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7445989) and next prime (7445993).

It is not a de Polignac number, because 7445991 - 2¹ = 7445989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7445993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201225 + ... + 201261.

It is an arithmetic number, because the mean of its divisors is an integer number (494570).

Almost surely, 2^7445991 is an apocalyptic number.

7445991 is a deficient number, since it is larger than the sum of its proper divisors (4423689).

7445991 is an frugal number, since it uses more digits than its factorization.

7445991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 47 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 7445991 is about 2728.7343219889. The cubic root of 7445991 is about 195.2723872525.

The spelling of 7445991 in words is "seven million, four hundred forty-five thousand, nine hundred ninety-one".