1242623457 has 16 divisors (see below), whose sum is σ = 1841806080. Its totient is φ = 828018576.

The previous prime is 1242623423. The next prime is 1242623467. The reversal of 1242623457 is 7543262421.

1242623457 is a `hidden beast` number, since 1 + 24 + 2 + 623 + 4 + 5 + 7 = 666.

It is not a de Polignac number, because 1242623457 - 2¹⁴ = 1242607073 is a prime.

It is a super-2 number, since 2×1242623457² = 3088226111773261698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242623467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53128 + ... + 72854.

It is an arithmetic number, because the mean of its divisors is an integer number (115112880).

Almost surely, 2^1242623457 is an apocalyptic number.

It is an amenable number.

1242623457 is a deficient number, since it is larger than the sum of its proper divisors (599182623).

1242623457 is a wasteful number, since it uses less digits than its factorization.

1242623457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22069 (or 22063 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 1242623457 is about 35250.8646276939. The cubic root of 1242623457 is about 1075.0941924316.

Adding to 1242623457 its reverse (7543262421), we get a palindrome (8785885878).

The spelling of 1242623457 in words is "one billion, two hundred forty-two million, six hundred twenty-three thousand, four hundred fifty-seven".