740721501 has 24 divisors (see below), whose sum is σ = 1220015160. Its totient is φ = 429014016.

The previous prime is 740721491. The next prime is 740721503. The reversal of 740721501 is 105127047.

It can be written as a sum of positive squares in 4 ways, for example, as 1153476 + 739568025 = 1074^2 + 27195^2 .

It is not a de Polignac number, because 740721501 - 2¹⁴ = 740705117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740721503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184216 + ... + 188193.

It is an arithmetic number, because the mean of its divisors is an integer number (50833965).

Almost surely, 2^740721501 is an apocalyptic number.

It is an amenable number.

740721501 is a deficient number, since it is larger than the sum of its proper divisors (479293659).

740721501 is a wasteful number, since it uses less digits than its factorization.

740721501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372445 (or 372442 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 740721501 is about 27216.1992386887. The cubic root of 740721501 is about 904.7980384268.

Adding to 740721501 its reverse (105127047), we get a palindrome (845848548).

The spelling of 740721501 in words is "seven hundred forty million, seven hundred twenty-one thousand, five hundred one".