1242662026 has 4 divisors (see below), whose sum is σ = 1863993042. Its totient is φ = 621331012.

The previous prime is 1242661949. The next prime is 1242662027. The reversal of 1242662026 is 6202662421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6202662421 = 1093 ⋅5674897.

It can be written as a sum of positive squares in only one way, i.e., 812307001 + 430355025 = 28501^2 + 20745^2 .

It is not an unprimeable number, because it can be changed into a prime (1242662027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310665505 + ... + 310665508.

Almost surely, 2^1242662026 is an apocalyptic number.

1242662026 is a deficient number, since it is larger than the sum of its proper divisors (621331016).

1242662026 is an equidigital number, since it uses as much as digits as its factorization.

1242662026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621331015.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 1242662026 is about 35251.4116880445. The cubic root of 1242662026 is about 1075.1053153717.

The spelling of 1242662026 in words is "one billion, two hundred forty-two million, six hundred sixty-two thousand, twenty-six".