42740356 has 6 divisors (see below), whose sum is σ = 74795630. Its totient is φ = 21370176.

The previous prime is 42740353. The next prime is 42740359. The reversal of 42740356 is 65304724.

It is an interprime number because it is at equal distance from previous prime (42740353) and next prime (42740359).

It can be written as a sum of positive squares in only one way, i.e., 41990400 + 749956 = 6480^2 + 866^2 .

It is not an unprimeable number, because it can be changed into a prime (42740353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5342541 + ... + 5342548.

Almost surely, 2^42740356 is an apocalyptic number.

42740356 is the 3495-th centered heptagonal number.

It is an amenable number.

42740356 is a deficient number, since it is larger than the sum of its proper divisors (32055274).

42740356 is a wasteful number, since it uses less digits than its factorization.

42740356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10685093 (or 10685091 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 42740356 is about 6537.6108786008. The cubic root of 42740356 is about 349.6332375753.

The spelling of 42740356 in words is "forty-two million, seven hundred forty thousand, three hundred fifty-six".