1240145146 has 4 divisors (see below), whose sum is σ = 1860217722. Its totient is φ = 620072572.

The previous prime is 1240145117. The next prime is 1240145161. The reversal of 1240145146 is 6415410421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1239814521 + 330625 = 35211^2 + 575^2 .

It is a super-2 number, since 2×1240145146² = 3075919966294722632, 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, 310036285 + ... + 310036288.

Almost surely, 2^1240145146 is an apocalyptic number.

1240145146 is a deficient number, since it is larger than the sum of its proper divisors (620072576).

1240145146 is an equidigital number, since it uses as much as digits as its factorization.

1240145146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620072575.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1240145146 is about 35215.6945977216. The cubic root of 1240145146 is about 1074.3789875601.

Adding to 1240145146 its reverse (6415410421), we get a palindrome (7655555567).

The spelling of 1240145146 in words is "one billion, two hundred forty million, one hundred forty-five thousand, one hundred forty-six".