1242258545 has 16 divisors (see below), whose sum is σ = 1628909568. Its totient is φ = 901971840.

The previous prime is 1242258469. The next prime is 1242258547. The reversal of 1242258545 is 5458522421.

It is not a de Polignac number, because 1242258545 - 2¹⁴ = 1242242161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242258499 and 1242258508.

It is not an unprimeable number, because it can be changed into a prime (1242258547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15632 + ... + 52238.

It is an arithmetic number, because the mean of its divisors is an integer number (101806848).

Almost surely, 2^1242258545 is an apocalyptic number.

It is an amenable number.

1242258545 is a deficient number, since it is larger than the sum of its proper divisors (386651023).

1242258545 is a wasteful number, since it uses less digits than its factorization.

1242258545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37240.

The product of its digits is 128000, while the sum is 38.

The square root of 1242258545 is about 35245.6883178638. The cubic root of 1242258545 is about 1074.9889438199.

The spelling of 1242258545 in words is "one billion, two hundred forty-two million, two hundred fifty-eight thousand, five hundred forty-five".