1242069049 has 9 divisors (see below), whose sum is σ = 1345458639. Its totient is φ = 1146102360.

The previous prime is 1242069019. The next prime is 1242069119. The reversal of 1242069049 is 9409602421.

It is a happy number.

The square root of 1242069049 is 35243.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 183738025 + 1058331024 = 13555^2 + 32532^2 .

It is not a de Polignac number, because 1242069049 - 2²⁵ = 1208514617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242068999 and 1242069017.

It is not an unprimeable number, because it can be changed into a prime (1242069019) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 456804 + ... + 459514.

Almost surely, 2^1242069049 is an apocalyptic number.

1242069049 is the 35243-rd square number.

1242069049 is the 17622-nd centered octagonal number.

It is an amenable number.

1242069049 is a deficient number, since it is larger than the sum of its proper divisors (103389590).

1242069049 is an frugal number, since it uses more digits than its factorization.

1242069049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5448 (or 2724 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The cubic root of 1242069049 is about 1074.9342808932.

The spelling of 1242069049 in words is "one billion, two hundred forty-two million, sixty-nine thousand, forty-nine".