1242512419 has 4 divisors (see below), whose sum is σ = 1248756400. Its totient is φ = 1236268440.

The previous prime is 1242512399. The next prime is 1242512423. The reversal of 1242512419 is 9142152421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9142152421 = 21277 ⋅429673.

It is a cyclic number.

It is not a de Polignac number, because 1242512419 - 2¹⁹ = 1241988131 is a prime.

It is a super-2 number, since 2×1242512419² = 3087674222738463122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242510419) 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, 3121692 + ... + 3122089.

It is an arithmetic number, because the mean of its divisors is an integer number (312189100).

Almost surely, 2^1242512419 is an apocalyptic number.

1242512419 is a deficient number, since it is larger than the sum of its proper divisors (6243981).

1242512419 is an equidigital number, since it uses as much as digits as its factorization.

1242512419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6243980.

The product of its digits is 5760, while the sum is 31.

The square root of 1242512419 is about 35249.2896240477. The cubic root of 1242512419 is about 1075.0621688221.

The spelling of 1242512419 in words is "one billion, two hundred forty-two million, five hundred twelve thousand, four hundred nineteen".