1240013402 has 4 divisors (see below), whose sum is σ = 1860020106. Its totient is φ = 620006700.

The previous prime is 1240013393. The next prime is 1240013413. The reversal of 1240013402 is 2043100421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2043100421 = 73 ⋅27987677.

It can be written as a sum of positive squares in only one way, i.e., 856206121 + 383807281 = 29261^2 + 19591^2 .

It is a super-2 number, since 2×1240013402² = 3075266474279227208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310003349 + ... + 310003352.

Almost surely, 2^1240013402 is an apocalyptic number.

1240013402 is a deficient number, since it is larger than the sum of its proper divisors (620006704).

1240013402 is an equidigital number, since it uses as much as digits as its factorization.

1240013402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620006703.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1240013402 is about 35213.8240184164. The cubic root of 1240013402 is about 1074.3409414765.

Adding to 1240013402 its reverse (2043100421), we get a palindrome (3283113823).

The spelling of 1240013402 in words is "one billion, two hundred forty million, thirteen thousand, four hundred two".