1242753995 has 32 divisors (see below), whose sum is σ = 1811911680. Its totient is φ = 799286400.

The previous prime is 1242753983. The next prime is 1242754003. The reversal of 1242753995 is 5993572421.

It is not a de Polignac number, because 1242753995 - 2¹⁰ = 1242752971 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57914 + ... + 76416.

It is an arithmetic number, because the mean of its divisors is an integer number (56622240).

Almost surely, 2^1242753995 is an apocalyptic number.

1242753995 is a deficient number, since it is larger than the sum of its proper divisors (569157685).

1242753995 is a wasteful number, since it uses less digits than its factorization.

1242753995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18635.

The product of its digits is 680400, while the sum is 47.

The square root of 1242753995 is about 35252.7161364908. The cubic root of 1242753995 is about 1075.1318374454.

The spelling of 1242753995 in words is "one billion, two hundred forty-two million, seven hundred fifty-three thousand, nine hundred ninety-five".