1242478501 has 8 divisors (see below), whose sum is σ = 1356434784. Its totient is φ = 1128689520.

The previous prime is 1242478477. The next prime is 1242478547. The reversal of 1242478501 is 1058742421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242478501 - 2⁷ = 1242478373 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 (1242478591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26031 + ... + 56236.

It is an arithmetic number, because the mean of its divisors is an integer number (169554348).

Almost surely, 2^1242478501 is an apocalyptic number.

1242478501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1242478501 is a deficient number, since it is larger than the sum of its proper divisors (113956283).

1242478501 is a wasteful number, since it uses less digits than its factorization.

1242478501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83651.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 1242478501 is about 35248.8085046857. The cubic root of 1242478501 is about 1075.0523864141.

The spelling of 1242478501 in words is "one billion, two hundred forty-two million, four hundred seventy-eight thousand, five hundred one".