1242992001 has 4 divisors (see below), whose sum is σ = 1657322672. Its totient is φ = 828661332.

The previous prime is 1242991879. The next prime is 1242992017. The reversal of 1242992001 is 1002992421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1002992421 = 3 ⋅334330807.

It is not a de Polignac number, because 1242992001 - 2¹¹ = 1242989953 is a prime.

It is a super-2 number, since 2×1242992001² = 3090058229099968002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242992001.

It is not an unprimeable number, because it can be changed into a prime (1242992021) 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, 207165331 + ... + 207165336.

It is an arithmetic number, because the mean of its divisors is an integer number (414330668).

Almost surely, 2^1242992001 is an apocalyptic number.

It is an amenable number.

1242992001 is a deficient number, since it is larger than the sum of its proper divisors (414330671).

1242992001 is an equidigital number, since it uses as much as digits as its factorization.

1242992001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414330670.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1242992001 is about 35256.0916864022. The cubic root of 1242992001 is about 1075.2004676800.

The spelling of 1242992001 in words is "one billion, two hundred forty-two million, nine hundred ninety-two thousand, one".