7266942421 has 4 divisors (see below), whose sum is σ = 7267151500. Its totient is φ = 7266733344.

The previous prime is 7266942341. The next prime is 7266942439. The reversal of 7266942421 is 1242496627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1242496627 = 457 ⋅2718811.

It can be written as a sum of positive squares in 2 ways, for example, as 4213827396 + 3053115025 = 64914^2 + 55255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7266942421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7266942481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38496 + ... + 126553.

It is an arithmetic number, because the mean of its divisors is an integer number (1816787875).

Almost surely, 2^7266942421 is an apocalyptic number.

It is an amenable number.

7266942421 is a deficient number, since it is larger than the sum of its proper divisors (209079).

7266942421 is a wasteful number, since it uses less digits than its factorization.

7266942421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209078.

The product of its digits is 290304, while the sum is 43.

The square root of 7266942421 is about 85246.3630954424. The cubic root of 7266942421 is about 1936.9447801302.

The spelling of 7266942421 in words is "seven billion, two hundred sixty-six million, nine hundred forty-two thousand, four hundred twenty-one".