1240371994 has 4 divisors (see below), whose sum is σ = 1860557994. Its totient is φ = 620185996.

The previous prime is 1240371967. The next prime is 1240372019. The reversal of 1240371994 is 4991730421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4991730421 = 37 ⋅134911633.

It can be written as a sum of positive squares in only one way, i.e., 1227591369 + 12780625 = 35037^2 + 3575^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310092997 + ... + 310093000.

Almost surely, 2^1240371994 is an apocalyptic number.

1240371994 is a deficient number, since it is larger than the sum of its proper divisors (620186000).

1240371994 is an equidigital number, since it uses as much as digits as its factorization.

1240371994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620185999.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 1240371994 is about 35218.9152871010. The cubic root of 1240371994 is about 1074.4444922220. Note that the first 4 decimals are identical.

The spelling of 1240371994 in words is "one billion, two hundred forty million, three hundred seventy-one thousand, nine hundred ninety-four".