542021649 has 16 divisors (see below), whose sum is σ = 784422912. Its totient is φ = 330922368.

The previous prime is 542021581. The next prime is 542021717. The reversal of 542021649 is 946120245.

It is an interprime number because it is at equal distance from previous prime (542021581) and next prime (542021717).

It is not a de Polignac number, because 542021649 - 2⁷ = 542021521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (542021549) 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, 49764 + ... + 59669.

It is an arithmetic number, because the mean of its divisors is an integer number (49026432).

Almost surely, 2^542021649 is an apocalyptic number.

It is an amenable number.

542021649 is a deficient number, since it is larger than the sum of its proper divisors (242401263).

542021649 is a wasteful number, since it uses less digits than its factorization.

542021649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109576.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 542021649 is about 23281.3584010899. The cubic root of 542021649 is about 815.3402415932.

The spelling of 542021649 in words is "five hundred forty-two million, twenty-one thousand, six hundred forty-nine".