7457821001245 has 4 divisors (see below), whose sum is σ = 8949385201500. Its totient is φ = 5966256800992.

The previous prime is 7457821001237. The next prime is 7457821001251. The reversal of 7457821001245 is 5421001287547.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1669649038201 + 5788171963044 = 1292149^2 + 2405862^2 .

It is a cyclic number.

It is not a de Polignac number, because 7457821001245 - 2³ = 7457821001237 is a prime.

It is a super-2 number, since 2×7457821001245² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7457821001195 and 7457821001204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745782100120 + ... + 745782100129.

It is an arithmetic number, because the mean of its divisors is an integer number (2237346300375).

Almost surely, 2^{7457821001245} is an apocalyptic number.

It is an amenable number.

7457821001245 is a deficient number, since it is larger than the sum of its proper divisors (1491564200255).

7457821001245 is a wasteful number, since it uses less digits than its factorization.

7457821001245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491564200254.

The product of its (nonzero) digits is 627200, while the sum is 46.

The spelling of 7457821001245 in words is "seven trillion, four hundred fifty-seven billion, eight hundred twenty-one million, one thousand, two hundred forty-five".